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LG OLED B9 vs LG OLED C9

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

Better figure, where one is clearly better

LGOLED B9LGOLED C9
Overview
Released20192019
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 processingAI Picture, AI Brightness, 4K Upscaler and dynamic tone mappingAI Picture, AI Brightness, 4K Upscaler and dynamic tone mapping
Motion handlingNative 120Hz (RTINGS); exact LG France 55-inch sheet confirms 4K HFR at 120fps over HDMI and USB. Original UK and Austrian sheets retain the launch wording that HDMI HFR would be enabled by update.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 (all HDMI 2.1 at 4K 120 Hz+)4 (all HDMI 2.1 at 4K 120 Hz+)
Variable refresh rateHDMI VRR, G-Sync CompatibleHDMI VRR, G-Sync Compatible
Auto low latency modeYesYes
HDMI detailFour HDMI 2.1 inputs, one rear and three side; eARC on HDMI 2. RTINGS' original test lacked an HDMI 2.1 source and did not measure 4K 120Hz input.Four HDMI 2.1 inputs, one rear and three side; eARC on HDMI 2
Game featuresHDMI VRR and ALLM. RTINGS records G-Sync Compatible firmware support in its June 2020 update; this is a later feature, rather than a launch-day capability. No FreeSync support is claimed.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
Processorα7 Gen2 Intelligent Processorα9 Gen2 Intelligent Processor
Speakers40 W, 2.2 channels40 W, 2.2 channels
Dolby AtmosYesYes
eARCYesYes
Wi-FiWi-Fi 5 (802.11ac)Wi-Fi 5 (802.11ac)
Bluetooth5.05.0
Audio featuresDolby Atmos, AI Sound, Clear Voice III and DTS decoding; RTINGS confirms eARC Dolby Atmos and DTS:X passthrough to compatible receivers.Dolby Atmos, AI Sound, Clear Voice III and DTS decoding
CastingApple AirPlay 2; regional maker sheets include this later featureApple AirPlay 2; introduced through a post-launch update
Software updatesFirst sale retained at year precision because no exact maker on-sale month was established by the bounded source search.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.
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; headphone output also fittedOptical digital audio output; headphone output also fitted
Design and power
SizeWithout stand (W × H × D): 55″ 1228 × 706 × 46.9 mm; 65″ 1449 × 830 × 46.9 mm; 77″ 1723 × 992 × 55.3 mm. Exact PLA regional LG sheets fill missing UK size measurements.Without stand (W × H × D): 55″ 1228 × 706 × 46.9 mm; 65″ 1449 × 830 × 46.9 mm; 77″ 1722 × 991 × 56 mm
Stand55″ and 65″ stand width 559 mm; 77″ with stand 1723 × 1043 × 270 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 boxMagic Remote and power cable; UK 65-inch sheet lists two AA batteriesMR19 Magic Remote, two AA batteries and attached power cable

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