Samsung QN90D 65" vs Vizio OLED 55"
The Verdict
Samsung's QN90D delivers exceptional brightness at 4000 nits with Mini-LED backlighting, making it superior for bright rooms and HDR content, though it lacks Dolby Vision support. Vizio's 55" OLED excels in contrast and color accuracy with perfect blacks and superior viewing angles typical of OLED technology, but maxes out at 600 nits brightness. Samsung offers a larger 65" screen, more robust audio (60W vs 30W), faster gaming response (5ms vs 10ms), and stronger upscaling via Neural Quantum Processor 4K. Vizio counters with Wi-Fi 6, true OLED picture quality, and Dolby Vision support at half the price. For bright living rooms prioritizing size and gaming performance, Samsung wins decisively. OLED enthusiasts with controlled lighting and budget constraints should choose Vizio, though the smaller screen may disappoint. Samsung QN90D is the better all-around performer for most households.
Who Should Buy
Buy the Samsung QN90D 65" if…
- →Excellent Mini-LED backlighting with over 2,000 dimming zones for deep contrast
- →All four HDMI ports support 4K@120Hz — ideal for multi-console gaming setups
- →Up to 4,000 nits peak brightness handles even the brightest HDR highlights
Buy the Vizio OLED 55" if…
- →Most affordable 55-inch OLED at $999 — perfect blacks at a budget price
- →Dolby Vision, HDR10+, and Dolby Atmos — supports all major formats
- →120Hz with VRR and ALLM — capable gaming display
Category Scores
Pros & Cons
Samsung QN90D 65"
Pros
- Excellent Mini-LED backlighting with over 2,000 dimming zones for deep contrast
- All four HDMI ports support 4K@120Hz — ideal for multi-console gaming setups
- Up to 4,000 nits peak brightness handles even the brightest HDR highlights
- Anti-reflection coating dramatically cuts glare in bright living rooms
- Neural Quantum Processor 4K delivers sharp, accurate upscaling from lower-resolution content
Cons
- Mini-LED blooming can still appear around bright objects on dark backgrounds
- No Dolby Atmos pass-through from the TV's built-in speakers
- Tizen OS interface can feel cluttered with sponsored content and ads
- At $1,799 it is significantly pricier than competing Mini-LED options
Vizio OLED 55"
Pros
- Most affordable 55-inch OLED at $999 — perfect blacks at a budget price
- Dolby Vision, HDR10+, and Dolby Atmos — supports all major formats
- 120Hz with VRR and ALLM — capable gaming display
- Infinite contrast ratio with pixel-perfect black levels
- 4x HDMI ports including HDMI 2.1 for next-gen consoles
Cons
- SmartCast OS is the weakest smart TV platform — buggy and slow
- Only 600 nits peak brightness — dimmer than LG and Samsung OLEDs
- Vizio has exited the TV market — long-term software support uncertain
- Image processing quality trails LG, Sony, and Samsung OLED models
- Build quality feels inferior to similarly priced LG A2 OLED
Full Specifications
| Spec | Samsung QN90D 65" | Vizio OLED 55" |
|---|---|---|
| Body | ||
| VESA mount | 400 x 400mm | 300 x 300mm |
| Weight | 71.9 lbs | 33.5 lbs |
| Dimensions (w/ stand) | 57.1 x 36.6 x 13.4 inches | 48.2 x 29.7 x 10.0 inches |
| Dimensions | — | 48.2 x 28.0 x 1.5 inches |
| Audio | ||
| Output (watts) | 60 | 30 |
| Speakers | 4.2.2ch Object Tracking Sound+ | 2.0ch |
| Dolby Atmos | ||
| Gaming | ||
| VRR (Variable Refresh Rate) | ||
| ALLM | ||
| Input lag (ms) | 5 | 10 |
| Display | ||
| HDR | Quantum HDR+, HDR10+, HLG | Dolby Vision, HDR10+, HDR10, HLG |
| Size | 65" | 55" |
| Type | Neo QLED Mini-LED | OLED |
| Resolution | 3840 x 2160 (4K UHD) | 3840 x 2160 (4K) |
| Refresh rate | 120Hz (4K@120Hz native) | 120Hz |
| Brightness (nits) | 4000 | 600 |
| Smart TV | ||
| Os | Tizen OS | SmartCast (Chromecast built-in) |
| Voice assistant | Bixby, Alexa, Google Assistant | Google Assistant, Alexa |
| Processor | ||
| Chipset | Neural Quantum Processor 4K | — |
| Connectivity | ||
| Wi-Fi | Wi-Fi 5 (802.11ac) | Wi-Fi 6 |
| Ethernet | ||
| Bluetooth | 5.2 | 5.0 |
| USB ports | 2 | 1 |
| HDMI ports | 4 | 4 |
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This comparison is based on verified manufacturer specifications covering display, performance, camera, battery, and build quality. Scores are generated by analyzing specs across weighted categories on a 10-point scale. Learn more about our methodology.
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