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LG OLED B8 vs LG OLED B9

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

Better figure, where one is clearly better

LGOLED B8LGOLED B9
Overview
Released20182019
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 processing4K Upscaler, adaptive colour enhancement, noise reduction and enhanced dynamic tone mappingAI Picture, AI Brightness, 4K Upscaler and dynamic tone mapping
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.Native 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.
Sizes
Sizes55, 65″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, 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 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.
Game featuresGame picture mode; no variable refresh rate (RTINGS)HDMI 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.
Smart TV and sound
Smart TV platformwebOSwebOS
Processorα7 Intelligent Processorα7 Gen2 Intelligent Processor
Speakers–40 W, 2.2 channels
Dolby AtmosYesYes
eARC–Yes
Wi-FiWi-Fi 5 (802.11ac)Wi-Fi 5 (802.11ac)
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.–
Audio featuresClear Voice III, One Touch Sound Tuning, adaptive sound control and DTS decodingDolby Atmos, AI Sound, Clear Voice III and DTS decoding; RTINGS confirms eARC Dolby Atmos and DTS:X passthrough to compatible receivers.
Casting–Apple AirPlay 2; regional maker sheets include this later feature
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 2018 lineup announcement confirms the B8 series; an exact earliest on-sale month was not established, so release retains year precision.First sale retained at year precision because no exact maker on-sale month was established by the bounded source search.
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): both 55″ variants 1228 × 707 × 47 mm; both 65″ variants 1449 × 831 × 47 mmWithout 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.
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.55″ and 65″ stand width 559 mm; 77″ with stand 1723 × 1043 × 270 mm
VESA pattern300 × 200 mm for both sizes and variants55″ and 65″: 300 × 200 mm; 77″: 400 × 200 mm
In the boxMR18 Magic Remote, two AA batteries and attached power cableMagic Remote and power cable; UK 65-inch sheet lists two AA batteries

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