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Samsung LED H6400 vs Sony X90J

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

Better figure, where one is clearly better

SamsungLED H6400SonyX90J
Overview
Released2014April 2021
Display
PanelLED LCDLED LCD
Panel detailFlat LCD with active-shutter 3D; HDTVTest identifies direct LED backlighting on the 40-inch model. Samsung's 200 Clear Motion Rate is not native panel refresh.–
Resolution1920 × 1080 (Full HD)3840 × 2160 (4K)
Refresh rate–120 Hz
HDR formatsNoneHDR10, HLG, Dolby Vision
Picture processingSamsung's UK specifications list Wide Colour Enhancer Plus and Film Mode, with no Micro Dimming or Precision Black local dimming.Cognitive Processor XR, XR Contrast Booster, XR HDR Remaster, XR Triluminos Pro, XR Smoothing, Dual Database Processing, XR Super Resolution and XR 4K Upscaling. Full-array LED backlight with local dimming; maker does not publish a zone count.
Picture modes–Custom, Cinema, IMAX Enhanced, Game, Graphics, Photo, Dolby Vision Bright/Dark and Netflix Calibrated.
Motion handlingSamsung's 200 Clear Motion Rate combines processing and lighting behaviour. Native panel Hz is unpublished in the checked maker tables.XR Motion Clarity; UK accepts 4K 120 Hz HDMI input and maker Japan explicitly lists a native 120 Hz panel.
Viewing angleHDTVTest observed picture washout beyond about 45 degrees off-axis on its 40-inch sample.–
Sizes
Sizes32, 40, 48, 55, 65, 75″50, 55, 65, 75″
Largest size75″75″
Gaming
HDMI ports4 (0 HDMI 2.1 at 4K 120 Hz+)4 (2 HDMI 2.1 at 4K 120 Hz+)
Variable refresh rateNoneHDMI VRR
Auto low latency modeNoYes
HDMI detailFour HDMI inputs with HDMI 1.4 3D and Audio Return Channel in Samsung's UK tables; component, shared composite, SCART and headphone connections also provided.Four side HDMI inputs. HDMI 3/4 support 4K 120 Hz, VRR and ALLM; eARC shares HDMI 3. HDCP 2.3. Current maker specification confirms VRR after firmware; original What Hi-Fi? review has no VRR.
Input lag43 ms on the 40-inch sample using a Leo Bodnar tester (HDTVTest).–
Game featuresManual Game Mode; no variable refresh or automatic low-latency switching.PlayStation 5 Auto HDR Tone Mapping and Auto Genre Picture Mode after software updates. Both reviews explain that Dolby Vision and 4K 120 Hz require different HDMI modes; no low-latency Dolby Vision Game mode is claimed.
Smart TV and sound
Smart TV platformSamsung Smart TVGoogle TV
Processor3D HyperReal Engine; quad-core smart processor on the checked 40-, 55- and 65-inch UK tablesCognitive Processor XR
Dolby Atmos–Yes
Speakers20 W–
eARCNoYes
Wi-FiBuilt-in Wi-FiWi-Fi 5 (802.11ac)
Bluetooth–4.2
Speaker detailSamsung lists two 10 W down-firing full-range speakers, without a woofer.UK 50/65-inch tables: Acoustic Multi-Audio with two bass-reflex full-range speakers and two sound-positioning tweeters, X-Balanced Speaker, 10 W + 10 W (20 W). Other sizes’ unpublished/unread amplifier totals are not borrowed.
Audio featuresDolby MS10, DTS Studio Sound, DTS Premium Sound 5.1 and TV SoundConnect on the checked 40-, 48-, 55- and 65-inch tables.Dolby Atmos and DTS Digital Surround; Voice Zoom 2, room/user-position calibration and 3D Surround Upscaling.
Voice assistantsOriginal Samsung voice control and Voice Interaction; availability depends on the original services.Voice remote; UK maker says no built-in microphone. The UK X94J variant’s different feet and Rich Colour Enhancer identified by What Hi-Fi? are not assigned to X90J.
CastingScreen Mirroring, Smart View and Wi-Fi Direct in Samsung's UK tables.Chromecast built-in, Apple AirPlay and HomeKit. Google TV is confirmed by maker Japan and both exact reviews; UK support labels the underlying Android TV system.
TV tunersThe 48-inch UK table explicitly lists DVB-T2/C. The other checked sizes list DVB-T/C without T2; HDTVTest and What Hi-Fi confirm Freeview HD on the 40-inch UK model.UK twin DVB-T/T2, DVB-C and DVB-S/S2 tuners; analogue and CI+.
USBThree USB ports, media playback, recording and time shift.2 × side USB according to current UK maker tables. What Hi-Fi? describes three; maker count is retained. USB HDD recording supported.
EthernetEthernet LAN.1 × side Ethernet LAN.
Optical audio outOne optical digital audio output.1 × side digital audio output.
Design and power
SizeWidth × height × depth without stands: 32-inch 732.3 × 430.7 × 62.9 mm; 40-inch 917.6 × 535.4 × 63.1 mm; 48-inch 1086.1 × 630.1 × 63.5 mm; 55-inch 1241.4 × 717.4 × 64 mm; 65-inch 1465.4 × 845.3 × 70.9 mm; 75-inch 1687 × 970 × 70.9 mm. Configuration weights exclude stands.Without stand, W × H × D: 50-inch 111.9 × 64.9 × 7.0 cm; 55-inch 123.3 × 71.1 × 7.2 cm; 65-inch 145.2 × 83.4 × 7.2 cm; 75-inch 167.5 × 96.2 × 7.3 cm. All configuration weights exclude stand; maker does not publish with-stand weights in these tables. TechRadar labels the 65-inch with-stand measurements as without stand; maker dimensions are retained.
StandSwivelling four-legged Quad stand on the checked UK 40-, 48-, 55- and 65-inch models.50-inch foot width 66.5 cm, with stand 111.9 × 71.5 × 28.6 cm. UK 55/65/75-inch have standard and narrow positions: widths 106.1/45.8, 120.8/46.0 and 133.0/55.9 cm respectively. Their with-stand dimensions are 123.3 × 78.4 × 33.8, 145.2 × 90.5 × 33.8 and 167.5 × 104.0 × 41.0 cm.
VESA pattern–50-inch 200 × 200 mm; 55/65/75-inch 300 × 300 mm.
Power useTypical use by size from Samsung's UK tables: 32-inch 43 W; 40-inch 50 W; 48-inch 59 W; 55-inch 71 W; 65-inch 97 W; 75-inch 124 W.UK 75-inch energy consumption 164 kWh per 1000 hours. UK 50/75-inch standby 0.50 W; network standby 2.00 W over Wi-Fi/LAN or 1.0 W over Bluetooth.
Colours–Black bezel and Titanium Black Slim Blade Stand.
In the boxTwo SSG-5100GB 3D glasses, standard and Smart Control remotes, IR extender, power cable and manual on the checked 40-, 48-, 55- and 65-inch tables.Table-top stand, voice remote, batteries, power cord and instructions. Maker Japan records first 50-inch sale on 24 April 2021, 55/65-inch on 1 May and 75-inch on 22 May; April month precision is retained. Launch-review reports of missing UK apps are historical, not a claim about current software.

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