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LG OLED B3 vs LG OLED B4

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

Better figure, where one is clearly better

LGOLED B3LGOLED B4
Overview
ReleasedApril 2023March 2024
Display
PanelOLEDOLED
Panel detail–Self-lit 4K OLED with pixel dimming
Resolution3840 × 2160 (4K)3840 × 2160 (4K)
Refresh rate120 Hz120 Hz
HDR formatsDolby Vision, HDR10, HLGDolby Vision, HDR10, HLG
Picture processingAI Picture Pro, AI Super Upscaling 4K, Dynamic Tone Mapping, AI Brightness Control and Filmmaker ModeAI Picture Pro, α8 AI Super Upscaling 4K, AI Brightness Control, Dynamic Tone Mapping Pro and Filmmaker Mode
Picture modes–Personalised Picture Wizard, Vivid, Standard, APS, Cinema, Sports, Game, Filmmaker and ISF Expert bright/dark room modes
Motion handlingUK sheets label 100Hz native and explicitly support 4K 120fps HFR over HDMI.Native 120Hz panel; OLED Motion and HDMI 4K 120 fps input
Sizes
Sizes55, 65, 77″48, 55, 65, 77″
Largest size77″77″
Gaming
HDMI ports4 (2 HDMI 2.1 at 4K 120 Hz+)4 (all HDMI 2.1 at 4K 120 Hz+)
Variable refresh rateHDMI VRR, FreeSync, G-Sync CompatibleHDMI VRR, FreeSync Premium, G-Sync Compatible
Auto low latency modeYesYes
HDMI detailFour HDMI inputs, with 4K 120Hz, VRR, ALLM and QMS on two; eARC on HDMI 3. RTINGS identifies the two 4K 120Hz inputs as HDMI 3 and 4.Four inputs support 4K 120Hz, VRR, ALLM and QMS; eARC on HDMI 3
Variable refresh range–LG specifies 40–120Hz
Game featuresHGiG, Game Optimiser and Game Dashboard; FreeSync Compatible and G-Sync CompatibleGame Optimiser and Dashboard, HGiG, AMD FreeSync Premium, NVIDIA G-SYNC Compatible and Dolby Vision gaming at 4K 120Hz
Smart TV and sound
Smart TV platformwebOSwebOS
Processorα7 AI Processor 4K Gen6α8 AI Processor 4K
Speakers20 W, 2.0 channels20 W, 2.0 channels
Dolby AtmosYesYes
eARCYesYes
Wi-FiWi-Fi 5Wi-Fi 5
Bluetooth5.05.1
Speaker detail20 W, 2.0-channel down-firing speakersDown-firing 2.0-channel speakers
Audio featuresDolby Atmos, Clear Voice Pro and AI Sound Pro virtual 5.1.2 up-mixα8 AI Sound Pro with virtual 9.1.2 up-mixing, acoustic tuning, Clear Voice Pro, Bluetooth Surround Ready and WiSA up to 2.1 channels
Voice assistants–Built-in Amazon Alexa and LG intelligent voice recognition; supported languages vary by country
CastingApple AirPlay 2Apple AirPlay 2, ThinQ remote app and Multi View
Software updatesLaunch webOS 23; UK maker lists security updates until 31 December 2027webOS 24; LG states four upgrades over five years with regional scheduling differences and security support through 31 December 2028. LG Australia's March 2024 launch notice confirms the range available now and lists 55/65-inch B4 March availability; release records that first confirmed series month, not a universal UK size-specific date.
USBTwo USB 2.0 inputsTwo USB 2.0 ports
EthernetOne Ethernet inputEthernet LAN port
Optical audio outOne optical digital audio outputOne optical digital audio output
Design and power
SizeWithout stand (W × H × D): 55″ 1228 × 708 × 46.9 mm; 65″ 1449 × 832 × 46.9 mm; 77″ 1723 × 992 × 55.3 mmWithout stand (W × H × D): 48″ 1070 × 620 × 45.9 mm; 55″ 1228 × 708 × 45.9 mm; 65″ 1449 × 832 × 45.9 mm; 77″ 1719 × 989 × 50.9 mm
StandCentre stand footprint: 55″ and 65″ 559 × 246 mm; 77″ 749 × 270 mmWith stand (W × H × D; weight): 48″ 1070 × 684 × 235 mm, 11.7 kg; 55″ 1228 × 772 × 235 mm, 14.5 kg; 65″ 1449 × 896 × 235 mm, 17.3 kg; 77″ 1719 × 1057 × 319 mm, 23.5 kg. Stand footprint: 48″ 933 × 235 mm; 55/65″ 1057 × 235 mm; 77″ 1403 × 319 mm.
VESA pattern55″ and 65″ 300 × 200 mm; 77″ 400 × 200 mm300 × 200 mm across these UK sizes
Power useUnder 0.5 W in standbyUnder 0.5 W standby; 100–240 V AC, 50–60Hz supply
In the boxMagic Remote with two AA batteries and attached power cableMagic Remote MR24, two AA batteries and attached power cable

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