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LG OLED B8 vs LG OLED CX

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

Better figure, where one is clearly better

LGOLED B8LGOLED CX
Overview
Released2018March 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 processing4K Upscaler, adaptive colour enhancement, noise reduction and enhanced 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 panel with motion interpolation and Motion Pro black-frame insertion (RTINGS). HDMI does not accept 4K at 120Hz; What Hi-Fi? reports internal HFR playback cannot combine HFR with HDR on the α7 processor.OLED Motion Pro; 120Hz panel refresh rate
Sizes
Sizes55, 65″48, 55, 65, 77″
Largest size65″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, FreeSync, G-Sync Compatible
Auto low latency mode–Yes
HDMI detailFour HDMI 2.0 inputs, one rear and three side; ARC on HDMI 2. No full-bandwidth HDMI 2.1 input (What Hi-Fi?).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 featuresGame picture mode; no variable refresh rate (RTINGS)G-Sync Compatible, FreeSync, HGiG and Instant Game Response with VRR and ALLM
Smart TV and sound
Smart TV platformwebOSwebOS
Processorα7 Intelligent Processorα9 Gen3 AI Processor 4K
Dolby AtmosYesYes
eARC–Yes
Wi-FiWi-Fi 5 (802.11ac)Wi-Fi 5
Bluetooth4.25.0
Speaker detailUK PLA models: 40 W 2.2-channel system with two woofers; UK SLC models: 20 W 2.0-channel system. Both are down-firing.LG UK lists 40 W, 2.2 channels for the 65″ OLED65CX6LA
Audio featuresClear Voice III, One Touch Sound Tuning, adaptive sound control and DTS decodingAI Sound Pro, AI Acoustic Tuning, Clear Voice IV and Bluetooth Surround Ready
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 restrictionLG ThinQ AI, Google Assistant and Amazon Alexa; LG says Google Assistant is unavailable in the Republic of Ireland
Software updatesLG's 2018 lineup announcement confirms the B8 series; an exact earliest on-sale month was not established, so release retains year precision.webOS 5.0 at launch
TV tunersUK DVB-T2/C/S2UK 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 and headphone output on UK modelsOptical digital audio output; UK OLED65CX6LA also has a shared headphone/line output
Design and power
SizeWithout stand (W × H × D): both 55″ variants 1228 × 707 × 47 mm; both 65″ variants 1449 × 831 × 47 mmUK 65″ OLED65CX6LA without stand 1449 × 830 × 46.9 mm; with stand 1449 × 862 × 251 mm, 32.6 kg
StandPLA Alpine stand versus SLC Crescent stand (LG confirmation in What Hi-Fi?). With stand (W × H × D): 55″ PLA 1228 × 752 × 220 mm; 55″ SLC 1228 × 776 × 319 mm; 65″ PLA 1449 × 876 × 220 mm; 65″ SLC 1449 × 901 × 319 mm.UK 65″ OLED65CX6LA footprint 998 × 251 mm
VESA pattern300 × 200 mm for both sizes and variantsUK 65″ OLED65CX6LA 300 × 200 mm
Power use–Under 0.5 W standby
In the boxMR18 Magic Remote, two AA batteries and attached power cableMagic Remote MR20, 2 AA batteries and attached power cable

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