Sony X77L 55" vs Sony X90K 65" (Full Array LED)
The Verdict
Sony's X90K 65" commands a significant premium over the X77L 55", but justifies it with substantially superior specs across nearly every dimension. Picture quality heavily favors the X90K: its Full Array LED backlighting with 1200 nits brightness (vs. 400 nits) delivers dramatically better contrast, HDR impact, and black levels compared to the entry-level LED panel. The X90K's 120Hz refresh rate and VRR support make it substantially better for gaming, with half the input lag (8ms vs. 15ms). Dolby Vision HDR, Dolby Atmos audio, and a larger 65" screen round out the advantages. The X77L remains competent for casual viewing at 55" with acceptable brightness and Google TV integration, making it attractive for budget-conscious buyers. However, the X90K's full-array dimming, superior contrast ratio, and gaming features represent genuine quality improvements beyond mere spec inflation. For anyone prioritizing picture quality or gaming performance, the X90K's additional investment yields measurable returns. Budget buyers should accept the X77L's limitations; enthusiasts should choose the X90K.
Who Should Buy
Buy the Sony X77L 55" if…
- →Sony's color accuracy and motion handling are superior to budget competitors
- →Google TV with Chromecast built-in and Apple AirPlay 2
- →Four HDMI ports are generous at this price
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
Sony X77L 55"
Pros
- Sony's color accuracy and motion handling are superior to budget competitors
- Google TV with Chromecast built-in and Apple AirPlay 2
- Four HDMI ports are generous at this price
- Motionflow XR produces smooth motion for sports and movies
- Clean, minimalist design fits any room
Cons
- 60Hz panel — not ideal for gaming or fast action
- No Dolby Vision — surprising for a Sony TV
- 400-nit brightness is low for HDR content
- 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 | Sony X77L 55" | Sony X90K 65" (Full Array LED) |
|---|---|---|
| Body | ||
| VESA mount | 200 x 200mm | 300 x 300mm |
| Weight | 27.6 lbs | 46.3 lbs |
| Dimensions (w/ stand) | 48.5 x 30.9 x 10.6 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) | 15 | 8 |
| Display | ||
| HDR | HDR10, HLG | Dolby Vision, HDR10, HLG |
| Size | 55" | 65" |
| Type | LED | Full Array LED (VA LCD) |
| Resolution | 3840 x 2160 (4K UHD) | 3840 x 2160 (4K) |
| Refresh rate | 60Hz | 120Hz |
| Brightness (nits) | 400 | 1200 |
| Smart TV | ||
| Os | Google TV | Google TV |
| Voice assistant | Google Assistant, Alexa, Apple AirPlay 2 | Google Assistant, Alexa |
| Processor | ||
| Chipset | X1 4K HDR Processor | — |
| Connectivity | ||
| Wi-Fi | Wi-Fi 5 (802.11ac) | Wi-Fi 5 |
| Ethernet | ||
| Bluetooth | 5.0 | 4.2 |
| USB ports | 2 | 2 |
| HDMI ports | 4 | 4 |
Related Comparisons
- Sony X90K 65" (Full Array LED) vs Vizio P-Series Quantum 65"
- Sony X90K 65" (Full Array LED) vs Vizio OLED 55"
- Sony X90K 65" (Full Array LED) vs TCL QM8 65"
- Sony X90K 65" (Full Array LED) vs TCL 6-Series R655 55" (Mini-LED QLED)
- Sony X90K 65" (Full Array LED) vs TCL 5-Series S555 65" (QLED)
- Sony X90K 65" (Full Array LED) vs Sony X90L 65"
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.
Explore more in tvs, see all Sony products or all Sony products. View full details for the Sony X77L 55" or the Sony X90K 65" (Full Array LED).