Samsung CU8000 55" vs Sony X90K 65" (Full Array LED)
The Verdict
Samsung's CU8000 offers budget-friendly 4K viewing at 55 inches with basic HDR10+ support and adequate brightness at 300 nits, making it suitable for casual viewers. Sony's X90K stands in an entirely different tier,its 65-inch Full Array LED panel delivers 1200 nits of brightness, Dolby Vision, 120Hz refresh rate, and genuinely responsive gaming with 8ms input lag and VRR support. Picture quality differences are substantial: Sony's VA-type LCD with full-array backlighting produces superior contrast and deeper blacks, while Samsung relies on edge-lit LED. Gaming enthusiasts will notice Sony's advantages immediately,VRR eliminates tearing, lower latency matters during competitive play. Audio matches on paper (20W, 2.0ch) but Sony adds Dolby Atmos processing. At $399, the Samsung delivers respectable baseline functionality; at $1099, the Sony justifies premium pricing through superior contrast, gaming responsiveness, and brightness headroom. For most living rooms, Sony's larger screen and exceptional brightness also create a more immersive experience. Budget buyers comfortable with smaller screens and limited gaming may find Samsung adequate, but serious viewers should invest in Sony's significantly superior panel technology and features.
Who Should Buy
Buy the Samsung CU8000 55" if…
- →Very affordable entry into Samsung's 4K smart TV lineup
- →HDR10+ support improves contrast in compatible content
- →Tizen OS is a mature, full-featured smart TV platform
Buy the Sony X90K 65" (Full Array LED) if…
- →Excellent Sony image processing at a competitive mid-range price
- →Full Array Local Dimming provides solid contrast for an LED TV
- →Dolby Vision and Dolby Atmos for home theater HDR experience
Category Scores
Pros & Cons
Samsung CU8000 55"
Pros
- Very affordable entry into Samsung's 4K smart TV lineup
- HDR10+ support improves contrast in compatible content
- Tizen OS is a mature, full-featured smart TV platform
- Lightweight and easy to wall-mount at 27 lbs
- Crystal Processor 4K provides decent upscaling from 1080p
Cons
- 60Hz panel — no 120Hz for smooth gaming or sports
- Low peak brightness limits HDR impact
- No VRR or HDMI 2.1 — poor for next-gen consoles
- 20W speakers sound thin — a soundbar is essential
Sony X90K 65" (Full Array LED)
Pros
- Excellent Sony image processing at a competitive mid-range price
- Full Array Local Dimming provides solid contrast for an LED TV
- Dolby Vision and Dolby Atmos for home theater HDR experience
- 120Hz with VRR and ALLM — capable gaming display
- Google TV with Chromecast built-in for seamless streaming
Cons
- Only 2 of 4 HDMI ports support 4K@120Hz
- 20W audio is very weak — soundbar essential
- Bluetooth 4.2 and Wi-Fi 5 are behind current standards
- Some blooming visible with full array backlighting in dark scenes
Full Specifications
| Spec | Samsung CU8000 55" | Sony X90K 65" (Full Array LED) |
|---|---|---|
| Body | ||
| VESA mount | 200 x 200mm | 300 x 300mm |
| Weight | 27.1 lbs | 46.3 lbs |
| Dimensions (w/ stand) | 48.8 x 30.8 x 8.8 inches | 57.2 x 35.3 x 12.0 inches |
| Dimensions | — | 57.2 x 33.1 x 2.7 inches |
| Audio | ||
| Output (watts) | 20 | 20 |
| Speakers | 2.0ch | 2.0ch Acoustic Multi-Audio |
| Dolby Atmos | ||
| Gaming | ||
| VRR (Variable Refresh Rate) | ||
| ALLM | ||
| Input lag (ms) | 12 | 8 |
| Display | ||
| HDR | HDR10+, HLG | Dolby Vision, HDR10, HLG |
| Size | 55" | 65" |
| Type | Crystal UHD LED | Full Array LED (VA LCD) |
| Resolution | 3840 x 2160 (4K UHD) | 3840 x 2160 (4K) |
| Refresh rate | 60Hz | 120Hz |
| Brightness (nits) | 300 | 1200 |
| Smart TV | ||
| Os | Tizen OS | Google TV |
| Voice assistant | Bixby, Alexa | Google Assistant, Alexa |
| Processor | ||
| Chipset | Crystal Processor 4K | — |
| Connectivity | ||
| Wi-Fi | Wi-Fi 5 (802.11ac) | Wi-Fi 5 |
| Ethernet | ||
| Bluetooth | 5.2 | 4.2 |
| USB ports | 1 | 2 |
| HDMI ports | 3 | 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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