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2026 comparison
Updated Jan 6, 2026
|Sources: Amazon, ManufacturerHP Spectre x360 14" 2-in-1 Core Ultra 7 155H vs Dell Inspiron 15 3520 — Intel Core i5-1235U
The HP Spectre x360 14" 2-in-1 Core Ultra 7 155H is the flagship option that outshines the Dell Inspiron 15 3520 — Intel Core i5-1235U in display quality and performance. You get a stunning 2.8K OLED display and a powerful 16-core CPU, making it a no-brainer for creatives and professionals alike. If you're looking for a capable budget laptop for everyday tasks, the Dell Inspiron 15 3520 delivers solid performance but lacks the premium features and high-end display of the HP model.
📱 Display: 14" vs 15.6"⚖️ Weight: 51.15 oz vs 58.55 oz💾 RAM: 32 GB vs 16 GB
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HP Spectre x360 14" 2-in-1 Core Ultra 7 155H
★4.5
(156)•Best Buy
Processor:Intel Core Ultra 7 155H (Meteor Lake, 16 cores, up to 4.8 GHz)
Graphics:Intel Arc Graphics (Integrated)
AI Engine:Intel AI Boost (Dedicated NPU)
Cooling:Air (Dual fan with rear venting)
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Dell Inspiron 15 3520 — Intel Core i5-1235U
★4.5
(2,701)•Best Buy
Processor:Intel Core i5-1235U (Alder Lake-U, 10 cores, up to 4.4 GHz)
Graphics:Intel Iris Xe Graphics (Integrated; requires dual-channel RAM, otherwise UHD)
AI Engine:No (Not supported)
Cooling:Air (Single fan)
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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
HP Spectre x360 14" 2-in-1 Core Ultra 7 155H
Dell Inspiron 15 3520 — Intel Core i5-1235U
Display2 specs
Display SizeKey
HP Spectre x360 14" 2-in-1 Core Ultra 7 155H
14"
Dell Inspiron 15 3520 — Intel Core i5-1235U
15.6"Winner
Refresh Rate
HP Spectre x360 14" 2-in-1 Core Ultra 7 155H
48-120 Hz (Variable VRR)
Dell Inspiron 15 3520 — Intel Core i5-1235U
120 Hz
Performance2 specs
RAMKey
HP Spectre x360 14" 2-in-1 Core Ultra 7 155H
32 GB LPDDR5x-7467 MHzWinner
Dell Inspiron 15 3520 — Intel Core i5-1235U
8 GB or 16 GB DDR4-2666/3200 MHz
Storage
HP Spectre x360 14" 2-in-1 Core Ultra 7 155H
2 TB PCIe Gen4 NVMe M.2 SSDWinner
Dell Inspiron 15 3520 — Intel Core i5-1235U
512 GB PCIe NVMe M.2 SSD
Battery1 specs
Battery CapacityKey
HP Spectre x360 14" 2-in-1 Core Ultra 7 155H
68 Wh (4-cell Li-ion polymer)
Dell Inspiron 15 3520 — Intel Core i5-1235U
41 Wh (3-cell Li-ion) or 54 Wh (4-cell; config dependent)
Design1 specs
Weight
HP Spectre x360 14" 2-in-1 Core Ultra 7 155H
1,450 g (3.19 lbs)Winner
Dell Inspiron 15 3520 — Intel Core i5-1235U
1,660 g (3.65 lbs)
Connectivity1 specs
Connectivity
HP Spectre x360 14" 2-in-1 Core Ultra 7 155H
Wi-Fi 6E (802.11ax 2x2); Bluetooth 5.3
Dell Inspiron 15 3520 — Intel Core i5-1235U
Wi-Fi 6 (802.11ax 2x2); Bluetooth 5.1
+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: HP Spectre x360 14" 2-in-1 Core Ultra 7 155H vs Dell Inspiron 15 3520 — Intel Core i5-1235U
HP Spectre x360 14" 2-in-1 Core Ultra 7 155H
★4.5(156)Best Buy
Dell Inspiron 15 3520 — Intel Core i5-1235U
★4.5(2,701)Best Buy
| Criterion | HP Spectre x360 14" 2-in-1 Core Ultra 7 155H | Dell Inspiron 15 3520 — Intel Core i5-1235U |
|---|---|---|
| Rating | ★4.5(156)Best Buy | ★4.5(2,701)Best Buy |
Processor | Intel Core Ultra 7 155H (Meteor Lake, 16 cores, up to 4.8 GHz) | Intel Core i5-1235U (Alder Lake-U, 10 cores, up to 4.4 GHz) |
Graphics | Intel Arc Graphics (Integrated) | Intel Iris Xe Graphics (Integrated; requires dual-channel RAM, otherwise UHD) |
AI Engine | Intel AI Boost (Dedicated NPU) | No (Not supported) |
Cooling | Air (Dual fan with rear venting) | Air (Single fan) |
RAM | 32 GB LPDDR5x-7467 MHz | 8 GB or 16 GB DDR4-2666/3200 MHz |
RAM Upgrade | No (Soldered) | Yes (2x SODIMM slots, up to 16 GB officially, 32 GB unofficially) |
Storage | 2 TB PCIe Gen4 NVMe M.2 SSD | 512 GB PCIe NVMe M.2 SSD |
Storage Upgrade | Yes (1x M.2 2280 slot) | Yes (1x M.2 2230/2280 slot) |
Display Size | 14" | 15.6" |
Resolution | 2880 x 1800 (2.8K) | 1920 x 1080 (FHD) |
Aspect Ratio | 16:10 | 16:9 |
Screen Type | OLED (Multitouch; UWVA; Gorilla Glass NBT) | IPS (Anti-glare; Wide Viewing Angle) |
Refresh Rate | 48-120 Hz (Variable VRR) | 120 Hz |
Brightness | 400 nits (SDR) / 500 nits (HDR Peak) | 250 nits (Typical) |
Color Gamut | 100% DCI-P3 | 45% NTSC (approx. 60% sRGB) |
Keyboard Layout | US English (ANSI) without NumPad | US English (ANSI) with NumPad |
Keyboard Backlight | Yes | No (Optional/Configuration dependent; mostly No on retail units) |
Biometrics | Fingerprint reader (Power button) + IR Face Recognition | No (Fingerprint reader is optional/configuration dependent) |
Webcam | 9MP Wide Vision IR camera with hardware shutter | 720p HD camera |
USB Ports | 2x Thunderbolt 4 (USB-C); 1x USB-A 3.2 Gen 2 (10Gbps, drop-jaw) | 2x USB-A 3.2 Gen 1; 1x USB-A 2.0; (Note: USB-C is often ABSENT on i5-1235U US retail units) |
Video Ports | DisplayPort 2.1 via Thunderbolt 4 | 1x HDMI 1.4 (Supports up to 1920x1080 @ 60Hz) |
Audio Ports | 1x 3.5mm Headphone/Mic combo jack | 1x 3.5mm Headphone/Mic combo jack |
Connectivity | Wi-Fi 6E (802.11ax 2x2); Bluetooth 5.3 | Wi-Fi 6 (802.11ax 2x2); Bluetooth 5.1 |
Battery | 68 Wh (4-cell Li-ion polymer) | 41 Wh (3-cell Li-ion) or 54 Wh (4-cell; config dependent) |
Charger | 65 W USB-C adapter | 65 W Barrel-pin AC adapter (4.5mm) |
Weight | 1,450 g (3.19 lbs) | 1,660 g (3.65 lbs) |
Build Material | CNC Aluminum (Nightfall Black) | Plastic (Carbon Black) |
Operating System | Windows 11 Home | Windows 11 Home |
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HP Spectre x360 14" 2-in-1 Core Ultra 7 155H
Rating:★4.5(156)Best Buy
Processor:Intel Core Ultra 7 155H (Meteor Lake, 16 cores, up to 4.8 GHz)
Graphics:Intel Arc Graphics (Integrated)
AI Engine:Intel AI Boost (Dedicated NPU)
Cooling:Air (Dual fan with rear venting)
RAM:32 GB LPDDR5x-7467 MHz
RAM Upgrade:No (Soldered)
Storage:2 TB PCIe Gen4 NVMe M.2 SSD
Storage Upgrade:Yes (1x M.2 2280 slot)
Display Size:14"
Resolution:2880 x 1800 (2.8K)
Aspect Ratio:16:10
Screen Type:OLED (Multitouch; UWVA; Gorilla Glass NBT)
Refresh Rate:48-120 Hz (Variable VRR)
Brightness:400 nits (SDR) / 500 nits (HDR Peak)
Color Gamut:100% DCI-P3
Keyboard Layout:US English (ANSI) without NumPad
Keyboard Backlight:Yes
Biometrics:Fingerprint reader (Power button) + IR Face Recognition
Webcam:9MP Wide Vision IR camera with hardware shutter
USB Ports:2x Thunderbolt 4 (USB-C); 1x USB-A 3.2 Gen 2 (10Gbps, drop-jaw)
Video Ports:DisplayPort 2.1 via Thunderbolt 4
Audio Ports:1x 3.5mm Headphone/Mic combo jack
Connectivity:Wi-Fi 6E (802.11ax 2x2); Bluetooth 5.3
Battery:68 Wh (4-cell Li-ion polymer)
Charger:65 W USB-C adapter
Weight:1,450 g (3.19 lbs)
Build Material:CNC Aluminum (Nightfall Black)
Operating System:Windows 11 Home
✓ Pros:
- • Premium 2.8K OLED display with 120Hz refresh rate and IMAX Enhanced certification
- • Best-in-class 9MP webcam with AI noise reduction and hardware shutter
- • Massive 32GB RAM and 2TB SSD configuration (specific to 'eu0023dx' SKU)
- • Haptic touchpad provides consistent feedback across the entire surface
- • Includes rechargeable MPP 2.0 Tilt Pen and protective sleeve in the box
✗ Cons:
- • No built-in HDMI port (requires USB-C adapter)
- • Memory is soldered and cannot be upgraded later
- • Top-tier pricing reflects the flagship build and specs
- • Glossy OLED screen can be reflective in bright outdoor settings
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Dell Inspiron 15 3520 — Intel Core i5-1235U
Rating:★4.5(2,701)Best Buy
Processor:Intel Core i5-1235U (Alder Lake-U, 10 cores, up to 4.4 GHz)
Graphics:Intel Iris Xe Graphics (Integrated; requires dual-channel RAM, otherwise UHD)
AI Engine:No (Not supported)
Cooling:Air (Single fan)
RAM:8 GB or 16 GB DDR4-2666/3200 MHz
RAM Upgrade:Yes (2x SODIMM slots, up to 16 GB officially, 32 GB unofficially)
Storage:512 GB PCIe NVMe M.2 SSD
Storage Upgrade:Yes (1x M.2 2230/2280 slot)
Display Size:15.6"
Resolution:1920 x 1080 (FHD)
Aspect Ratio:16:9
Screen Type:IPS (Anti-glare; Wide Viewing Angle)
Refresh Rate:120 Hz
Brightness:250 nits (Typical)
Color Gamut:45% NTSC (approx. 60% sRGB)
Keyboard Layout:US English (ANSI) with NumPad
Keyboard Backlight:No (Optional/Configuration dependent; mostly No on retail units)
Biometrics:No (Fingerprint reader is optional/configuration dependent)
Webcam:720p HD camera
USB Ports:2x USB-A 3.2 Gen 1; 1x USB-A 2.0; (Note: USB-C is often ABSENT on i5-1235U US retail units)
Video Ports:1x HDMI 1.4 (Supports up to 1920x1080 @ 60Hz)
Audio Ports:1x 3.5mm Headphone/Mic combo jack
Connectivity:Wi-Fi 6 (802.11ax 2x2); Bluetooth 5.1
Battery:41 Wh (3-cell Li-ion) or 54 Wh (4-cell; config dependent)
Charger:65 W Barrel-pin AC adapter (4.5mm)
Weight:1,660 g (3.65 lbs)
Build Material:Plastic (Carbon Black)
Operating System:Windows 11 Home
✓ Pros:
- • 120Hz refresh rate provides smoother scrolling than typical 60Hz budget laptops
- • Memory (RAM) is not soldered and can be upgraded via two SODIMM slots
- • Includes a full-size SD card slot (rare in modern laptops)
- • Decent port selection with three USB-A ports and HDMI
- • Lift hinge design improves airflow and typing angle
✗ Cons:
- • Most high-volume US retail configurations (e.g., Best Buy) LACK a USB-C port
- • HDMI 1.4 port cannot output 4K at 60Hz (limited to 1080p)
- • No keyboard backlight on many standard configurations
- • Plastic chassis feels budget-oriented and attracts fingerprints
- • Display colors are washed out (45% NTSC) and not suitable for photo editing
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Which one is better?
The HP Spectre x360 14" 2-in-1 Core Ultra 7 155H is the better buy for most people - its 2.8K OLED display and powerful 16-core CPU crush the Dell Inspiron 15 3520's offerings.
Who should buy each?
Choose the HP Spectre x360 14" 2-in-1 Core Ultra 7 155H if: you need a stunning 2.8K display for photography, require high performance for creative work, or want a top-tier webcam for video calls.
Choose the Dell Inspiron 15 3520 — Intel Core i5-1235U if: you want a budget-friendly option with upgradeable RAM, need a larger 15.6" screen for multitasking, or prefer a similar-weight laptop for casual use.
Conclusion
With the key differences outlined, the decision should be clearer. Both options deliver quality—choose the one that fits your priorities.
Frequently Asked Questions
+Which has better value?
HP Spectre x360 14" 2-in-1 Core Ultra 7 155H excels if you value premium 2.8k oled display with 120hz refresh rate and imax enhanced certification. Dell Inspiron 15 3520 — Intel Core i5-1235U is better if you prioritize 120hz refresh rate provides smoother scrolling than typical 60hz budget laptops. 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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