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LG OLED B9 vs LG OLED CX

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

Better figure, where one is clearly better

LGOLED B9LGOLED CX
Overview
Released2019March 2020
Display
PanelOLEDOLED
Panel detail–Self-lit OLED with pixel dimming
Resolution3840 × 2160 (4K)3840 × 2160 (4K)
Refresh rate120 Hz120 Hz
HDR formatsDolby Vision, HDR10, HLGDolby Vision, HDR10, HLG
HDR extrasAdvanced HDR by Technicolor also supportedDolby Vision IQ and Dynamic Tone Mapping
Picture processingAI Picture, AI Brightness, 4K Upscaler and dynamic tone mappingAI Picture Pro, Face Enhancing, AI Upscaling, AI Genre Selection and AI Brightness
Picture modes–10 modes, including Filmmaker, Cinema, Game, HDR Effect and ISF Expert Bright Room and Dark Room
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.OLED Motion Pro; 120Hz panel refresh rate
Sizes
Sizes55, 65, 77″48, 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, FreeSync, 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 ports, 4K 120Hz with 10-bit HDR and 4:4:4 chroma at 40 Gbps (TechRadar); 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.G-Sync Compatible, FreeSync, HGiG and Instant Game Response with VRR and ALLM
Smart TV and sound
Smart TV platformwebOSwebOS
Processorα7 Gen2 Intelligent Processorα9 Gen3 AI Processor 4K
Speakers40 W, 2.2 channels–
Dolby AtmosYesYes
eARCYesYes
Wi-FiWi-Fi 5 (802.11ac)Wi-Fi 5
Bluetooth5.05.0
Speaker detail–LG UK lists 40 W, 2.2 channels for the 65″ OLED65CX6LA
Audio featuresDolby Atmos, AI Sound, Clear Voice III and DTS decoding; RTINGS confirms eARC Dolby Atmos and DTS:X passthrough to compatible receivers.AI Sound Pro, AI Acoustic Tuning, Clear Voice IV and Bluetooth Surround Ready
Voice assistants–LG ThinQ AI, Google Assistant and Amazon Alexa; LG says Google Assistant is unavailable in the Republic of Ireland
CastingApple AirPlay 2; regional maker sheets include this later feature–
Software updatesFirst sale retained at year precision because no exact maker on-sale month was established by the bounded source search.webOS 5.0 at launch
TV tuners–UK OLED65CX6LA has DVB-T2/T, DVB-C and DVB-S2/S; 2 RF inputs and CI+ 1.4
USBThree USB ports, two rear and one side3 × USB
EthernetEthernet LAN portEthernet port
Optical audio outOptical digital audio output; headphone output also fittedOptical digital audio output; UK OLED65CX6LA also has a shared headphone/line output
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.UK 65″ OLED65CX6LA without stand 1449 × 830 × 46.9 mm; with stand 1449 × 862 × 251 mm, 32.6 kg
Stand55″ and 65″ stand width 559 mm; 77″ with stand 1723 × 1043 × 270 mmUK 65″ OLED65CX6LA footprint 998 × 251 mm
VESA pattern55″ and 65″: 300 × 200 mm; 77″: 400 × 200 mmUK 65″ OLED65CX6LA 300 × 200 mm
Power use–Under 0.5 W standby
In the boxMagic Remote and power cable; UK 65-inch sheet lists two AA batteriesMagic Remote MR20, 2 AA batteries and attached power cable

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