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LG OLED B2 vs Sony BRAVIA AG9

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

Better figure, where one is clearly better

LGOLED B2SonyBRAVIA AG9
Overview
ReleasedMarch 20222019
Display
PanelOLEDOLED
Panel detail–Self-emitting OLED with Sony Pixel Contrast Booster and TRILUMINOS processing. Sony lists 1080p 100/120 Hz input, but only up to 4K 60 Hz; a native panel rate is not stated as a main specification.
Resolution3840 × 2160 (4K)3840 × 2160 (4K)
Refresh rate120 Hz–
HDR formatsDolby Vision, HDR10, HLGHDR10, HLG, Dolby Vision
HDR extrasDolby Vision IQ–
Picture processingAI Picture Pro, AI 4K Upscaling, Dynamic Tone Mapping, AI Brightness Control and Filmmaker ModeX1 Ultimate, 4K X-Reality PRO, dual database processing, Object-based Super Resolution, Pixel Contrast Booster and Netflix Calibrated mode.
Picture modes–Vivid, Standard, Cinema, Game, Graphics, Photo, Custom, Dolby Vision Bright/Dark and Netflix Calibrated.
Motion handlingUK sheets label 100Hz native and explicitly support 4K 120fps HFR over HDMI.Motionflow XR with Auto mode; Sony's UK sheet specifies video input up to 1080p 100/120 Hz and 4K 60 Hz. It does not publish a native panel rate for the complete UK series.
Sizes
Sizes55, 65, 77″55, 65, 77″
Largest size77″77″
Gaming
HDMI ports4 (2 HDMI 2.1 at 4K 120 Hz+)4 (0 HDMI 2.1 at 4K 120 Hz+)
Variable refresh rateHDMI VRR, FreeSync, G-Sync CompatibleNone
Auto low latency modeYes–
HDMI detailFour HDMI inputs, two supporting 4K 120Hz (TechRadar). RTINGS identifies these as HDMI 3 and 4; maker Canada 55″ sheet confirms eARC on HDMI 3.Four HDMI inputs (one side and three bottom), HDCP 2.3, with eARC on HDMI 3 according to Sony and AVForums. No HDMI input accepts 4K 120 Hz.
Game featuresHGiG, Game Optimiser and Game Dashboard; FreeSync Compatible and G-Sync CompatibleGame picture mode; Sony UK does not list VRR or ALLM.
Smart TV and sound
Smart TV platformwebOSAndroid TV
Processorα7 Gen5 AI Processor 4KX1 Ultimate
Speakers–60 W, 2.2 channels
Dolby AtmosYes–
eARCYesYes
Wi-Fi–Wi-Fi 802.11a/b/g/n/ac
Bluetooth5.0Bluetooth 4.2
Speaker detailTechRadar reports two down-firing speakers, 10 W each, on its reviewed model.Acoustic Surface Audio+ with two 20 W screen actuators and two 10 W subwoofer channels, total 60 W. TV centre-speaker mode can feed the screen from an external receiver.
Audio featuresDolby Atmos, Clear Voice Pro and AI Sound Pro virtual 5.1.2 up-mix. RTINGS reports no DTS or DTS:X passthrough.–
CastingApple AirPlay 2; Apple HomeKitChromecast built in, Google Play Store and Google Assistant through Android TV.
TV tuners–Dual DVB-T/T2 and DVB-S/S2 digital tuners, DVB-C and analogue reception according to Sony UK.
USB–Three USB ports, two side and one bottom, with USB HDD recording.
Ethernet–One bottom Ethernet socket.
Software updatesLaunch webOS 22; UK maker lists security updates until 31 December 2026–
Optical audio outOptical digital audio outputOne bottom digital audio output.
Design and power
SizeWithout stand (W × H × D): 55″ 1228 × 708 × 46.9 mm; 65″ 1449 × 832 × 46.9 mm; 77″ 1719 × 989 × 50.9 mmSony UK lists the 77″ body at approximately 1721 × 996 × 49 mm without stand. Configuration weights are Sony UK without-stand figures.
StandStand footprint: 55″ and 65″ 559 × 246 mm; 77″ 1403 × 319 mmLow central dark-silver stand, around 5 mm beneath the screen in AVForums' KD-55AG9 review; separate soundbars may block the picture when placed in front.
Colours–Black bezel and dark-silver stand.
VESA pattern55″, 65″ and 77″: 300 × 200 mm–

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