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LG OLED C8 vs LG OLED C9

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

Better figure, where one is clearly better

LGOLED C8LGOLED C9
Overview
ReleasedMarch 20182019
Display
PanelOLEDOLED
Resolution3840 × 2160 (4K)3840 × 2160 (4K)
Refresh rate120 Hz120 Hz
HDR formatsDolby Vision, HDR10, HLGDolby Vision, HDR10, HLG
HDR extrasAdvanced HDR by Technicolor also supportedAdvanced HDR by Technicolor also supported
Picture processingQuad Step noise reduction, 4K Upscaler, adaptive colour enhancement and enhanced dynamic tone mappingAI Picture, AI Brightness, 4K Upscaler and dynamic tone mapping
Motion handling120Hz panel with interpolation to 120fps (RTINGS); 4K HDMI input is limited to 60Hz. OLED Motion black-frame insertion is available.Native 120Hz (Trusted Reviews). Original UK sheets retain the launch wording that 4K HFR via HDMI would be enabled by update.
Sizes
Sizes55, 65, 77″55, 65, 77″
Largest size77″77″
Gaming
HDMI ports4 (0 HDMI 2.1 at 4K 120 Hz+)4 (all HDMI 2.1 at 4K 120 Hz+)
Variable refresh rateNoneHDMI VRR, G-Sync Compatible
Auto low latency mode–Yes
HDMI detailFour HDMI inputs, one rear and three side; ARC on HDMI 2. No HDMI 2.1 or VRR support (RTINGS).Four HDMI 2.1 inputs, one rear and three side; eARC on HDMI 2
Game featuresGame picture mode; no variable refresh rate (RTINGS)HDMI VRR and ALLM. G-Sync Compatible was a post-launch update; LG's November 2019 rollout began in North America, followed by Europe and other regions, so firmware availability differed by country.
Smart TV and sound
Smart TV platformwebOSwebOS
Processorα9 Intelligent Processorα9 Gen2 Intelligent Processor
Speakers40 W, 2.2 channels40 W, 2.2 channels
Dolby AtmosYesYes
eARC–Yes
Wi-FiWi-Fi 5 (802.11ac)Wi-Fi 5 (802.11ac)
Bluetooth4.25.0
Speaker detailTwo woofers; front-firing with stand and down-firing without stand–
Audio featuresClear Voice III, adaptive sound control and DTS decoding. RTINGS confirms Dolby Atmos over Dolby Digital Plus through ARC, but not Dolby TrueHD Atmos passthrough.Dolby Atmos, AI Sound, Clear Voice III and DTS decoding
Casting–Apple AirPlay 2; introduced through a post-launch update
Voice assistantsUK Google Assistant requires software update and is unavailable in the Republic of Ireland; compatible Google Home and Alexa devices sold separately, with the same stated regional restriction–
Software updatesLG's US launch release schedules the 55″ and 65″ for the week of 19 March 2018 and the 77″ for April; release uses month precision, not an inferred first delivery day.Launch webOS 4.5. Release year is conservative because LG's Australian launch table schedules 55″ and 65″ for March and 77″ for April, while the surrounding text says the range starts in April. The US schedule gives April for 55″ and 65″ and May for 77″; these schedules do not establish a single actual first shipping day.
TV tunersUK DVB-T2/C/S2–
USBThree USB ports, two rear and one sideThree USB ports, two rear and one side
EthernetEthernet LAN portEthernet LAN port
Optical audio outOptical digital audio output and headphone output on UK modelsOptical digital audio output; headphone output also fitted
Design and power
SizeWithout stand (W × H × D): 55″ 1228 × 707 × 47 mm; 65″ 1449 × 831 × 47 mm; 77″ 1722 × 991 × 56 mm. Exact LG Poland and Ukraine PLA sheets supply the 77-inch measurements.Without stand (W × H × D): 55″ 1228 × 706 × 46.9 mm; 65″ 1449 × 830 × 46.9 mm; 77″ 1722 × 991 × 56 mm
StandWith stand (W × H × D): 55″ 1228 × 757 × 230 mm; 65″ 1449 × 881 × 230 mm; 77″ 1722 × 1052 × 253 mmStand width: 55″ and 65″ 998 mm; 77″ 1189 mm
VESA pattern55″ and 65″: 300 × 200 mm; 77″: 400 × 200 mm55″ and 65″: 300 × 200 mm; 77″: 400 × 200 mm
In the boxMR18 Magic Remote, two AA batteries and attached power cableMR19 Magic Remote, two AA batteries and attached power cable

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