Roku Plus Series 55" vs Sony X90K 65" (Full Array LED)
The Verdict
Roku's Plus Series 55" delivers solid budget-friendly 4K entertainment with QLED technology, Dolby Vision support, and 700-nit brightness suitable for moderately lit rooms. Its Wi-Fi 6 connectivity and universal voice assistant compatibility offer practical smart TV features at an accessible price point. Sony's X90K 65" commands premium pricing but justifies it through superior specifications: Full Array LED backlighting with 1200-nit peak brightness provides dramatically better contrast and black levels, while 120Hz refresh rate with VRR support excels for gaming (8ms input lag vs. Roku's 13ms). The larger 65" screen and thinner 2.7" profile enhance the viewing experience. Audio performance is comparable at 20W with Dolby Atmos on both models. For casual streaming and movies on a budget, the Roku suffices, but serious videophiles and gamers should invest in the Sony's superior picture quality and gaming capabilities.
Who Should Buy
Buy the Roku Plus Series 55" if…
- →Roku OS is the simplest, cleanest smart TV platform available
- →Dolby Vision, HDR10+, AND Dolby Atmos decoding — unusual at $399
- →Works with every voice assistant: Alexa, Google, Siri (via AirPlay)
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
Roku Plus Series 55"
Pros
- Roku OS is the simplest, cleanest smart TV platform available
- Dolby Vision, HDR10+, AND Dolby Atmos decoding — unusual at $399
- Works with every voice assistant: Alexa, Google, Siri (via AirPlay)
- Wi-Fi 6 for reliable 4K streaming
- QLED color enhancement is visible versus basic LED panels
Cons
- 60Hz panel — no 120Hz or gaming features
- 700-nit brightness is okay but not impressive for HDR highlights
- Roku's ad-supported free channels are prominently pushed in the UI
- No VRR for next-gen console gaming
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 | Roku Plus Series 55" | Sony X90K 65" (Full Array LED) |
|---|---|---|
| Body | ||
| VESA mount | 200 x 200mm | 300 x 300mm |
| Weight | 26.5 lbs | 46.3 lbs |
| Dimensions (w/ stand) | 48.4 x 30.6 x 10.2 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) | 13 | 8 |
| Display | ||
| HDR | Dolby Vision, HDR10+, HLG | Dolby Vision, HDR10, HLG |
| Size | 55" | 65" |
| Type | QLED | Full Array LED (VA LCD) |
| Resolution | 3840 x 2160 (4K UHD) | 3840 x 2160 (4K) |
| Refresh rate | 60Hz | 120Hz |
| Brightness (nits) | 700 | 1200 |
| Smart TV | ||
| Os | Roku OS | Google TV |
| Voice assistant | Roku Voice, Alexa, Google Assistant, Apple AirPlay 2 | Google Assistant, Alexa |
| Processor | ||
| Chipset | Quad-core | — |
| Connectivity | ||
| Wi-Fi | Wi-Fi 6 (802.11ax) | Wi-Fi 5 |
| Ethernet | ||
| Bluetooth | 5.2 | 4.2 |
| USB ports | 1 | 2 |
| 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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