TCL Class S4 4K LED Smart TV (S4 / S450G) vs VIZIO Quantum Pro QLED 4K TV (2023)
Get the VIZIO Quantum Pro QLED 4K TV (2023) unless you need a budget option. The numbers tell the story: 800 nits peak brightness means you'll enjoy HDR content in all its glory, while the TCL Class S4 4K LED Smart TV (S4 / S450G) struggles at just 250 nits. In real-world use, the VIZIO's 120Hz refresh rate makes fast action scenes look smoother, perfect for gaming. Meanwhile, the TCL's 60Hz refresh rate is fine but can feel sluggish during intense gaming sessions or sports watching. If you're looking to save some cash, the TCL's impressive contrast ratio still offers a solid viewing experience in darker rooms, but it lacks the brightness and high refresh rate that gamers crave.
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TCL Class S4 4K LED Smart TV (S4 / S450G)
VIZIO Quantum Pro QLED 4K TV (2023)
Only the specs that differ are shown here. Winners are highlighted when the data is clear.
+Full specs, pros, and cons
Everything side-by-side with ratings and the full spec list.
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Full specs, pros, and cons
Everything side-by-side with ratings and the full spec list.
Comparison: TCL Class S4 4K LED Smart TV (S4 / S450G) vs VIZIO Quantum Pro QLED 4K TV (2023)
TCL Class S4 4K LED Smart TV (S4 / S450G)
VIZIO Quantum Pro QLED 4K TV (2023)
| Criterion | TCL Class S4 4K LED Smart TV (S4 / S450G) | VIZIO Quantum Pro QLED 4K TV (2023) |
|---|---|---|
| Rating | ★4.5(1,708)Amazon | ★4.2(1,534)Amazon |
Screen Size | 43" / 50" / 55" / 58" / 65" / 75" / 85" | 65" / 75" |
Resolution | 4K (2160p / 3840 x 2160) | 4K (3840 x 2160) |
Screen Type | LED LCD (Direct-lit LED backlight; typically VA panel) | QLED LCD (IPS-type / ADS Panel) |
Refresh Rate | 60 Hz native (Motion Rate 120) | 120 Hz native (Supports up to 240Hz @ 1080p for PC) |
Processor | Quad Core Processor 4K | IQ Ultra+ Processor |
Upscaling | 4K Upscaling | Spatial Scaling Engine |
HDR Formats | Dolby Vision, HDR10, HLG (No HDR10+) | Dolby Vision, HDR10+, HDR10, HLG |
Peak Brightness | ≈250 nits (SDR/HDR Real Scene) – Limited brightness | ≈1,000 nits (Marketed); ≈750-800 nits (HDR Real Scene tested) |
Local Dimming | No | Yes (Active Full Array; 40 zones on 65"; 80 zones on 75") |
Contrast | High native contrast (≈5000:1 to 8000:1 depending on size/unit) | ≈1,600:1 (Native) – Low native contrast due to IPS panel |
Color Gamut | Standard (≈75% DCI-P3); No Wide Color Gamut | ≈97% DCI-P3 (Quantum Color) |
HDMI Ports | 3x HDMI | 4x HDMI |
HDMI 2 1 | No (HDMI 2.0 bandwidth on all ports); eARC supported on HDMI 1 | Partial (Only HDMI 3 supports 4K@120Hz; HDMI 1 is eARC but 4K@60Hz) |
VRR | No | Yes (AMD FreeSync Premium Pro, HDMI Forum VRR; 48-120Hz) |
Allm | Yes (Auto Low Latency Mode) | Yes (Auto Low Latency Mode) |
Input Lag | ≈11 ms @ 4K 60Hz (Game Mode) | ≈14 ms @ 60Hz; ≈6 ms @ 120Hz |
Audio Channels | 2.0 Channel | 2.0 Channel |
Audio Power | 20 W (10W + 10W); 30 W (15W + 15W) on 85-inch model | 20 W (10W x 2) |
Audio Features | Dolby Atmos pass-through; DTS Virtual:X; Dolby Digital Plus | DTS:X; DTS Virtual:X; Dolby Atmos (Passthrough); Bluetooth Headphone capable |
Smart Platform | Google TV (Android TV) | VIZIO Home (formerly SmartCast) |
App Store | Google Play Store | VIZIO Home (Cloud-based apps, no local store) |
Voice Assistants | Google Assistant (Built-in); Works with Amazon Alexa | VIZIO Voice (Built-in to remote); Works with Alexa/Google/Apple Home |
Casting | Chromecast Built-in; Apple AirPlay | Apple AirPlay 2; Chromecast Built-in |
Connectivity | Wi-Fi 5 (802.11ac); Bluetooth 5.0; Ethernet (LAN); Optical Audio Out | Wi-Fi 6E (Tri-band 802.11ax); Bluetooth 5.2; Ethernet (LAN); USB 2.0 |
Tuner | ATSC 1.0 / Clear QAM | ATSC 1.0 (Digital) / Clear QAM (No ATSC 3.0) |
Vesa | 200x200 mm (43"/50"/55"); 300x300 mm (58"); 400x300 mm (65"); 400x400 mm (75"); 600x400 mm (85") | 400 x 300 mm (65"/75") |
Dimensions With Stand | 55": 48.3 x 29.8 x 10.1 in; 65": 57.0 x 34.7 x 11.6 in; 75": 65.7 x 39.8 x 13.5 in | 65": 56.9 x 35.5 x 12.7 in; 75": 65.7 x 40.5 x 13.4 in |
Weight | 55": 22.5 lbs; 65": 30.6 lbs; 75": 50.1 lbs (with stand) | 65": 41.0 lbs; 75": 59.8 lbs (with stand) |
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TCL Class S4 4K LED Smart TV (S4 / S450G)
✓ Pros:
- • Excellent native contrast ratio produces deep blacks (VA panel)
- • Google TV interface is fast, modern, and app-rich
- • Supports Dolby Vision and Dolby Atmos (rare at this price point)
- • Very low input lag (~11ms) makes it decent for casual gaming
✗ Cons:
- • Low peak brightness (~250 nits) means HDR content lacks 'pop'
- • No local dimming to improve dark scene performance further
- • Narrow viewing angles (picture washes out from the side)
- • Limited to 60Hz with no VRR or HDMI 2.1 bandwidth for next-gen consoles
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VIZIO Quantum Pro QLED 4K TV (2023)
✓ Pros:
- • Integrated Wi-Fi 6E (Tri-band) provides faster streaming speed than most competitors
- • IPS-type panel delivers wide viewing angles suitable for large group seating
- • High peak brightness (~800 nits real scene) combats glare effectively in bright rooms
- • Gaming port (HDMI 3) is separate from eARC port (HDMI 1), preserving functionality
✗ Cons:
- • Low native contrast causes blacks to appear gray in dark rooms (IPS characteristic)
- • Only one HDMI port supports 4K@120Hz (limiting for multi-console owners)
- • Local dimming zone count is low (40/80 zones), leading to noticeable blooming
- • VIZIO Home interface is heavy on ads and can feel sluggish compared to Google TV/Roku
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Which one is better?
The VIZIO Quantum Pro QLED 4K TV (2023) is the better buy for most people - its peak brightness of 800 nits crushes the TCL's 250 nits. That said, grab the TCL Class S4 4K LED Smart TV (S4 / S450G) if you're on a budget and mainly watch movies in darker settings - it offers a more immersive experience with deeper blacks.
Who should buy each?
Choose the TCL Class S4 4K LED Smart TV (S4 / S450G) if: you want deep blacks for dark room viewing, you need a budget-friendly option, or you play casual games without needing high refresh rates. (60 Hz refresh, 3 ports hdmi)
Choose the VIZIO Quantum Pro QLED 4K TV (2023) if: you want vibrant HDR content in bright rooms, you frequently game with higher refresh rates, or you watch with a large group thanks to wider viewing angles. (120 Hz refresh, 4 ports hdmi)
Conclusion
TCL Class S4 4K LED Smart TV (S4 / S450G) and VIZIO Quantum Pro QLED 4K TV (2023) are both solid choices. Match the strengths above to your budget and workflow to make the best call.
Frequently Asked Questions
+Which has better value?
TCL Class S4 4K LED Smart TV (S4 / S450G) excels if you value excellent native contrast ratio produces deep blacks (va panel). VIZIO Quantum Pro QLED 4K TV (2023) is better if you prioritize integrated wi-fi 6e (tri-band) provides faster streaming speed than most competitors. 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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