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2026 comparison
Updated Jan 7, 2026
|Sources: Amazon, ManufacturerSamsung Galaxy Watch Ultra vs Samsung Galaxy Watch6 Classic (47mm, Bluetooth)
If you're deciding between the Samsung Galaxy Watch Ultra and the Samsung Galaxy Watch6 Classic (47mm, Bluetooth), the Ultra is the better buy for most people—its impressive 100-hour battery life crushes the Classic's 40-hour max. What matters most here is how these differences translate to everyday use; the Ultra offers true multi-day battery life, which means less time charging and more time wearing. In real-world use, the Ultra's rugged Titanium build and 10ATM water resistance make it ideal for outdoor activities, while the Classic's rotating bezel enhances navigation. However, if you're after sleek design and a robust health suite, the Classic shines with features like FDA-cleared ECG and Body Composition, although these are limited to Samsung phones. Bottom line: the Ultra is worth the investment if you need durability and battery life, while the Classic is a solid pick for health tracking on a budget.
⚖️ Weight: 2.13 oz vs 2.08 oz💽 Storage: 32 GB vs 16 GB🏗️ Build: Titanium Grade 4 vs Stainless Steel
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Samsung Galaxy Watch Ultra
★4.4
(243)•Amazon
Compatibility:Android 11.0 or higher with 1.5GB+ RAM; Samsung Galaxy phone required for Energy Score, ECG, Sleep Apnea, and IHRN features
Operating System:Wear OS 5 powered by Samsung (One UI 6 Watch)
Case Size:47.4mm H x 47.1mm W x 12.1mm D
Case Material:Titanium (Grade 4) frame with cushion design; Sapphire Crystal glass
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Samsung Galaxy Watch6 Classic (47mm, Bluetooth)
★3.9
(565)•Amazon
Compatibility:Android 10.0 or higher with 1.5GB+ RAM (iOS NOT supported; some health features like ECG require a Samsung Galaxy phone)
Operating System:Wear OS 4 (Powered by Samsung, One UI 5 Watch)
Case Size:47mm (46.5 x 46.5 x 10.9 mm / 1.83 x 1.83 x 0.43 in)
Case Material:Case: Stainless Steel; Glass: Sapphire Crystal; Strap: Hybrid Eco-Leather (standard US retail)
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Key spec differences
Only the specs that differ are shown here. Winners are highlighted when the data is clear.
Winner= clear advantage
Spec
Samsung Galaxy Watch Ultra
Samsung Galaxy Watch6 Classic (47mm, Bluetooth)
Display1 specs
Display SizeKey
Samsung Galaxy Watch Ultra
1.5 in (37.3 mm) circular display
Samsung Galaxy Watch6 Classic (47mm, Bluetooth)
1.5 in (37.3 mm)
Performance1 specs
Storage
Samsung Galaxy Watch Ultra
32GBWinner
Samsung Galaxy Watch6 Classic (47mm, Bluetooth)
16 GB (Internal) / 2 GB RAM
Battery1 specs
Battery CapacityKey
Samsung Galaxy Watch Ultra
590mAh; Up to 100 hours (Power Saving); Up to 60 hours (Normal use, AOD off); Up to 48 hours (Exercise Power Saving)
Samsung Galaxy Watch6 Classic (47mm, Bluetooth)
425 mAh; Up to 40 hours (AOD Off); Up to 30 hours (AOD On)
Design2 specs
Weight
Samsung Galaxy Watch Ultra
60.5 g (Body only)
Samsung Galaxy Watch6 Classic (47mm, Bluetooth)
59.0 g / 2.08 oz (Case weight only)Winner
Water Resistance
Samsung Galaxy Watch Ultra
10 ATM + IP68 (ISO 22810 standard); Ocean swimming capable
Samsung Galaxy Watch6 Classic (47mm, Bluetooth)
5 ATM + IP68 (Water resistant up to 50 meters)
Software1 specs
Operating System
Samsung Galaxy Watch Ultra
Wear OS 5 powered by Samsung (One UI 6 Watch)
Samsung Galaxy Watch6 Classic (47mm, Bluetooth)
Wear OS 4 (Powered by Samsung, One UI 5 Watch)
Connectivity1 specs
Connectivity
Samsung Galaxy Watch Ultra
LTE (eSIM standard on all models); Wi-Fi 2.4+5GHz; Bluetooth 5.3; NFC
Samsung Galaxy Watch6 Classic (47mm, Bluetooth)
Bluetooth 5.3; Wi-Fi 2.4+5GHz (802.11 a/b/g/n); NFC
+Full specs, pros, and cons
Everything side-by-side with ratings and the full spec list.
Expand
Full specs, pros, and cons
Everything side-by-side with ratings and the full spec list.
Comparison: Samsung Galaxy Watch Ultra vs Samsung Galaxy Watch6 Classic (47mm, Bluetooth)
Samsung Galaxy Watch Ultra
★4.4(243)Amazon
Samsung Galaxy Watch6 Classic (47mm, Bluetooth)
★3.9(565)Amazon
| Criterion | Samsung Galaxy Watch Ultra | Samsung Galaxy Watch6 Classic (47mm, Bluetooth) |
|---|---|---|
| Rating | ★4.4(243)Amazon | ★3.9(565)Amazon |
Compatibility | Android 11.0 or higher with 1.5GB+ RAM; Samsung Galaxy phone required for Energy Score, ECG, Sleep Apnea, and IHRN features | Android 10.0 or higher with 1.5GB+ RAM (iOS NOT supported; some health features like ECG require a Samsung Galaxy phone) |
Operating System | Wear OS 5 powered by Samsung (One UI 6 Watch) | Wear OS 4 (Powered by Samsung, One UI 5 Watch) |
Case Size | 47.4mm H x 47.1mm W x 12.1mm D | 47mm (46.5 x 46.5 x 10.9 mm / 1.83 x 1.83 x 0.43 in) |
Case Material | Titanium (Grade 4) frame with cushion design; Sapphire Crystal glass | Case: Stainless Steel; Glass: Sapphire Crystal; Strap: Hybrid Eco-Leather (standard US retail) |
Display Type | Super AMOLED; Always-On Display; Peak brightness 3000 nits | Super AMOLED touchscreen (Always-On capable) |
Display Size | 1.5 in (37.3 mm) circular display | 1.5 in (37.3 mm) |
Resolution | 480 x 480 pixels | 480 x 480 pixels |
Always On Display | Yes | Yes |
Water Resistance | 10 ATM + IP68 (ISO 22810 standard); Ocean swimming capable | 5 ATM + IP68 (Water resistant up to 50 meters) |
Durability | MIL-STD-810H certified; Operating temp -20°C to 55°C; 9000m altitude resistance | MIL-STD-810H compliant (Environmental engineering considerations and laboratory tests) |
GPS | Dual-frequency GPS (L1+L5); Glonass; Beidou; Galileo | GPS, GLONASS, Galileo, BeiDou |
Connectivity | LTE (eSIM standard on all models); Wi-Fi 2.4+5GHz; Bluetooth 5.3; NFC | Bluetooth 5.3; Wi-Fi 2.4+5GHz (802.11 a/b/g/n); NFC |
NFC Payments | Samsung Wallet / Google Wallet | Yes (Samsung Wallet, Google Wallet) |
Sensors | Samsung BioActive Sensor (Optical Bio-signal + Electrical Heart + Bioelectrical Impedance Analysis); Temperature sensor; Accelerometer; Barometer; Gyro sensor; Geomagnetic sensor; Light sensor | Samsung BioActive Sensor (Optical Heart Rate + Electrical Heart + Bioelectrical Impedance Analysis); Temperature Sensor; Accelerometer; Barometer; Gyro Sensor; Geomagnetic Sensor; Light Sensor; 3D Hall Sensor |
Health Features | Energy Score; Sleep Apnea detection (FDA authorized); AGEs Index; Body Composition; ECG; Irregular Heart Rhythm Notification; Cycle Tracking with skin temperature; Sleep coaching | Body Composition (BIA); ECG (AFib detection); Sleep Coaching & Analysis; Blood Oxygen (SpO2); Cycle Tracking (Skin Temperature); Irregular Heart Rhythm Notification |
Workout Modes | Multisport tile (Triathlon/Duathlon/Aquathlon); Functional Threshold Power (FTP) for cycling; Race Partner; Track Back; Custom workouts via Quick Button | 90+ exercises; Automatic workout detection (Walking, Running, Cycling, Rowing, Elliptical, Dynamic High-Intensity, Swimming); Personalized Heart Rate Zones |
Storage | 32GB | 16 GB (Internal) / 2 GB RAM |
Speaker Mic | Speaker (with Siren support); Microphone | Yes (Built-in speaker and microphone) |
Calls | Yes (LTE standalone or via paired phone) | Yes (Make and answer calls via Bluetooth) |
Battery | 590mAh; Up to 100 hours (Power Saving); Up to 60 hours (Normal use, AOD off); Up to 48 hours (Exercise Power Saving) | 425 mAh; Up to 40 hours (AOD Off); Up to 30 hours (AOD On) |
Charging | Fast Wireless Charging (WPC Inductive); Proprietary puck required for max speed | Fast Wireless Charging (WPC-based puck included; no wall adapter) |
Weight | 60.5 g (Body only) | 59.0 g / 2.08 oz (Case weight only) |
Band Sizes | One Size (fits 145–205mm wrists via Dynamic Lug System) | Fits wrist sizes ~145–205 mm (M/L strap); Uses standard 20mm width (new One-Click mechanism, backwards compatible) |
Extras | Quick Button (customizable); 86dB Emergency Siren; Night Mode watch face; Gesture controls (Double Pinch) | Physical Rotating Bezel for navigation; Camera Controller; SmartThings smart home control; Fall Detection; SOS |
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Samsung Galaxy Watch Ultra
Rating:★4.4(243)Amazon
Compatibility:Android 11.0 or higher with 1.5GB+ RAM; Samsung Galaxy phone required for Energy Score, ECG, Sleep Apnea, and IHRN features
Operating System:Wear OS 5 powered by Samsung (One UI 6 Watch)
Case Size:47.4mm H x 47.1mm W x 12.1mm D
Case Material:Titanium (Grade 4) frame with cushion design; Sapphire Crystal glass
Display Type:Super AMOLED; Always-On Display; Peak brightness 3000 nits
Display Size:1.5 in (37.3 mm) circular display
Resolution:480 x 480 pixels
Always On Display:Yes
Water Resistance:10 ATM + IP68 (ISO 22810 standard); Ocean swimming capable
Durability:MIL-STD-810H certified; Operating temp -20°C to 55°C; 9000m altitude resistance
GPS:Dual-frequency GPS (L1+L5); Glonass; Beidou; Galileo
Connectivity:LTE (eSIM standard on all models); Wi-Fi 2.4+5GHz; Bluetooth 5.3; NFC
NFC Payments:Samsung Wallet / Google Wallet
Sensors:Samsung BioActive Sensor (Optical Bio-signal + Electrical Heart + Bioelectrical Impedance Analysis); Temperature sensor; Accelerometer; Barometer; Gyro sensor; Geomagnetic sensor; Light sensor
Health Features:Energy Score; Sleep Apnea detection (FDA authorized); AGEs Index; Body Composition; ECG; Irregular Heart Rhythm Notification; Cycle Tracking with skin temperature; Sleep coaching
Workout Modes:Multisport tile (Triathlon/Duathlon/Aquathlon); Functional Threshold Power (FTP) for cycling; Race Partner; Track Back; Custom workouts via Quick Button
Storage:32GB
Speaker Mic:Speaker (with Siren support); Microphone
Calls:Yes (LTE standalone or via paired phone)
Battery:590mAh; Up to 100 hours (Power Saving); Up to 60 hours (Normal use, AOD off); Up to 48 hours (Exercise Power Saving)
Charging:Fast Wireless Charging (WPC Inductive); Proprietary puck required for max speed
Weight:60.5 g (Body only)
Band Sizes:One Size (fits 145–205mm wrists via Dynamic Lug System)
Extras:Quick Button (customizable); 86dB Emergency Siren; Night Mode watch face; Gesture controls (Double Pinch)
✓ Pros:
- • True multi-day battery life (up to 100h in power saving)
- • Extremely durable Grade 4 Titanium build with 10ATM rating
- • Dual-frequency GPS (L1+L5) provides superior tracking accuracy
- • Brightest display in class (3000 nits) for outdoor visibility
- • Exclusive features like Siren and Multisport tile for triathletes
✗ Cons:
- • Large 47mm square-circle design may not fit smaller wrists
- • Key health features (ECG, Sleep Apnea) locked to Samsung phones
- • Proprietary band attachment (Dynamic Lug) limits third-party options
- • Charging speed is slower (~2 hours) compared to competitors
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Samsung Galaxy Watch6 Classic (47mm, Bluetooth)
Rating:★3.9(565)Amazon
Compatibility:Android 10.0 or higher with 1.5GB+ RAM (iOS NOT supported; some health features like ECG require a Samsung Galaxy phone)
Operating System:Wear OS 4 (Powered by Samsung, One UI 5 Watch)
Case Size:47mm (46.5 x 46.5 x 10.9 mm / 1.83 x 1.83 x 0.43 in)
Case Material:Case: Stainless Steel; Glass: Sapphire Crystal; Strap: Hybrid Eco-Leather (standard US retail)
Display Type:Super AMOLED touchscreen (Always-On capable)
Display Size:1.5 in (37.3 mm)
Resolution:480 x 480 pixels
Always On Display:Yes
Water Resistance:5 ATM + IP68 (Water resistant up to 50 meters)
Durability:MIL-STD-810H compliant (Environmental engineering considerations and laboratory tests)
GPS:GPS, GLONASS, Galileo, BeiDou
Connectivity:Bluetooth 5.3; Wi-Fi 2.4+5GHz (802.11 a/b/g/n); NFC
NFC Payments:Yes (Samsung Wallet, Google Wallet)
Sensors:Samsung BioActive Sensor (Optical Heart Rate + Electrical Heart + Bioelectrical Impedance Analysis); Temperature Sensor; Accelerometer; Barometer; Gyro Sensor; Geomagnetic Sensor; Light Sensor; 3D Hall Sensor
Health Features:Body Composition (BIA); ECG (AFib detection); Sleep Coaching & Analysis; Blood Oxygen (SpO2); Cycle Tracking (Skin Temperature); Irregular Heart Rhythm Notification
Workout Modes:90+ exercises; Automatic workout detection (Walking, Running, Cycling, Rowing, Elliptical, Dynamic High-Intensity, Swimming); Personalized Heart Rate Zones
Storage:16 GB (Internal) / 2 GB RAM
Speaker Mic:Yes (Built-in speaker and microphone)
Calls:Yes (Make and answer calls via Bluetooth)
Battery:425 mAh; Up to 40 hours (AOD Off); Up to 30 hours (AOD On)
Charging:Fast Wireless Charging (WPC-based puck included; no wall adapter)
Weight:59.0 g / 2.08 oz (Case weight only)
Band Sizes:Fits wrist sizes ~145–205 mm (M/L strap); Uses standard 20mm width (new One-Click mechanism, backwards compatible)
Extras:Physical Rotating Bezel for navigation; Camera Controller; SmartThings smart home control; Fall Detection; SOS
✓ Pros:
- • Iconic physical rotating bezel provides intuitive, smudge-free navigation
- • Comprehensive health suite including FDA-cleared ECG and Body Composition (BIA)
- • Stunning 1.5-inch Super AMOLED display with sapphire crystal protection
- • High-quality stainless steel build feels more premium than aluminum competitors
- • Seamless ecosystem integration with Samsung Galaxy phones
✗ Cons:
- • Battery life (max 40h) requires daily charging compared to multi-day competitors
- • Key health features (ECG, IHRN) are locked to Samsung phones only
- • Not compatible with iPhones (iOS)
- • Charging speed is decent but slower than OnePlus Watch 2's rapid charge
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Which one is better?
The Samsung Galaxy Watch Ultra is the better buy for most people - its 100-hour battery life crushes the Samsung Galaxy Watch6 Classic's 40-hour max.
Who should buy each?
Choose the Samsung Galaxy Watch Ultra if: you need multi-day battery life, enjoy outdoor adventures, or want the latest health tracking features. (2.13 oz weight, 32 GB storage)
Choose the Samsung Galaxy Watch6 Classic (47mm, Bluetooth) if: you prefer intuitive navigation with a rotating bezel, want a premium stainless steel design, or are looking for an affordable option with essential health features. (2.08 oz weight, 16 GB storage)
Conclusion
We hope this comparison helps you buy with confidence. Both products are dependable; the right one depends on how you will use it.
Frequently Asked Questions
+Which has better value?
Samsung Galaxy Watch Ultra excels if you value true multi-day battery life (up to 100h in power saving). Samsung Galaxy Watch6 Classic (47mm, Bluetooth) is better if you prioritize iconic physical rotating bezel provides intuitive, smudge-free navigation. Pick based on your budget and daily use.
+Is this an independent review?
Yes. We use affiliate links for monetization, but recommendations are research-driven and unbiased.
+Do newer models exist?
Check release timelines from the manufacturers and compare pricing before you buy. We refresh this page when major updates land.
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