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LG OLED C1 vs Sony X90J

Every spec side by side, from each maker's published figures.

Better figure, where one is clearly better

LGOLED C1SonyX90J
Overview
ReleasedMarch 2021April 2021
Display
PanelOLEDLED LCD
Panel detailSelf-lit OLED with pixel dimming–
Resolution3840 × 2160 (4K)3840 × 2160 (4K)
Refresh rate120 Hz120 Hz
HDR formatsDolby Vision, HDR10, HLGHDR10, HLG, Dolby Vision
HDR extrasDolby Vision IQ and Dynamic Tone Mapping–
Picture processingAI Picture Pro, Face Enhancing, AI Upscaling, AI Genre Selection and AI Brightness ControlCognitive Processor XR, XR Contrast Booster, XR HDR Remaster, XR Triluminos Pro, XR Smoothing, Dual Database Processing, XR Super Resolution and XR 4K Upscaling. Full-array LED backlight with local dimming; maker does not publish a zone count.
Picture modes9 modes, including Filmmaker, Cinema, Game and ISF Expert Bright Room and Dark RoomCustom, Cinema, IMAX Enhanced, Game, Graphics, Photo, Dolby Vision Bright/Dark and Netflix Calibrated.
Motion handlingOLED Motion ProXR Motion Clarity; UK accepts 4K 120 Hz HDMI input and maker Japan explicitly lists a native 120 Hz panel.
Sizes
Sizes48, 55, 65, 77, 83″50, 55, 65, 75″
Largest size83″75″
Gaming
HDMI ports4 (all HDMI 2.1 at 4K 120 Hz+)4 (2 HDMI 2.1 at 4K 120 Hz+)
Variable refresh rateHDMI VRR, FreeSync, G-Sync CompatibleHDMI VRR
Auto low latency modeYesYes
HDMI detailFour HDMI ports with 4K 120Hz, VRR and ALLM; eARC on HDMI 2Four side HDMI inputs. HDMI 3/4 support 4K 120 Hz, VRR and ALLM; eARC shares HDMI 3. HDCP 2.3. Current maker specification confirms VRR after firmware; original What Hi-Fi? review has no VRR.
Game featuresG-Sync Compatible, FreeSync Compatible, HGiG and Game OptimiserPlayStation 5 Auto HDR Tone Mapping and Auto Genre Picture Mode after software updates. Both reviews explain that Dolby Vision and 4K 120 Hz require different HDMI modes; no low-latency Dolby Vision Game mode is claimed.
Smart TV and sound
Smart TV platformwebOSGoogle TV
Processorα9 Gen4 AI Processor 4KCognitive Processor XR
Dolby AtmosYesYes
eARCYesYes
Wi-FiWi-Fi 5Wi-Fi 5 (802.11ac)
Bluetooth5.04.2
Speaker detailLG UK lists 40 W, 2.2 channels for the 65″ OLED65C14LBUK 50/65-inch tables: Acoustic Multi-Audio with two bass-reflex full-range speakers and two sound-positioning tweeters, X-Balanced Speaker, 10 W + 10 W (20 W). Other sizes’ unpublished/unread amplifier totals are not borrowed.
Audio featuresAI Sound Pro virtual 5.1.2 up-mix, AI Acoustic Tuning, Clear Voice Pro and Bluetooth Surround ReadyDolby Atmos and DTS Digital Surround; Voice Zoom 2, room/user-position calibration and 3D Surround Upscaling.
Voice assistantsGoogle Assistant and Amazon AlexaVoice remote; UK maker says no built-in microphone. The UK X94J variant’s different feet and Rich Colour Enhancer identified by What Hi-Fi? are not assigned to X90J.
CastingApple AirPlay 2 and Apple HomeKitChromecast built-in, Apple AirPlay and HomeKit. Google TV is confirmed by maker Japan and both exact reviews; UK support labels the underlying Android TV system.
Software updateswebOS 6.0 at launch–
TV tunersUK OLED65C14LB has DVB-T2/T, DVB-C and DVB-S2; 2 RF inputs and CI+ 1.4UK twin DVB-T/T2, DVB-C and DVB-S/S2 tuners; analogue and CI+.
USB3 × USB2 × side USB according to current UK maker tables. What Hi-Fi? describes three; maker count is retained. USB HDD recording supported.
EthernetEthernet port1 × side Ethernet LAN.
Optical audio outOptical digital audio output; UK OLED65C14LB also has a shared headphone/line output1 × side digital audio output.
Design and power
SizeUK 65″ OLED65C14LB without stand 1449 × 830 × 46.9 mm; with stand 1449 × 862 × 251 mm, 32.6 kgWithout stand, W × H × D: 50-inch 111.9 × 64.9 × 7.0 cm; 55-inch 123.3 × 71.1 × 7.2 cm; 65-inch 145.2 × 83.4 × 7.2 cm; 75-inch 167.5 × 96.2 × 7.3 cm. All configuration weights exclude stand; maker does not publish with-stand weights in these tables. TechRadar labels the 65-inch with-stand measurements as without stand; maker dimensions are retained.
StandUK 65″ OLED65C14LB footprint 998 × 251 mm50-inch foot width 66.5 cm, with stand 111.9 × 71.5 × 28.6 cm. UK 55/65/75-inch have standard and narrow positions: widths 106.1/45.8, 120.8/46.0 and 133.0/55.9 cm respectively. Their with-stand dimensions are 123.3 × 78.4 × 33.8, 145.2 × 90.5 × 33.8 and 167.5 × 104.0 × 41.0 cm.
VESA patternUK 65″ OLED65C14LB 300 × 200 mm50-inch 200 × 200 mm; 55/65/75-inch 300 × 300 mm.
Power useUnder 0.5 W standbyUK 75-inch energy consumption 164 kWh per 1000 hours. UK 50/75-inch standby 0.50 W; network standby 2.00 W over Wi-Fi/LAN or 1.0 W over Bluetooth.
Colours–Black bezel and Titanium Black Slim Blade Stand.
In the boxMagic Remote MR21N, 2 AA batteries and attached power cableTable-top stand, voice remote, batteries, power cord and instructions. Maker Japan records first 50-inch sale on 24 April 2021, 55/65-inch on 1 May and 75-inch on 22 May; April month precision is retained. Launch-review reports of missing UK apps are historical, not a claim about current software.

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