Bottom line: Which one is better?
Bottom line: Sony X900F is better.
Sony X900F is a better TV in this review of X850F Vs X900F because it has a higher native contrast ratio, better local dimming, better black uniformity, better HDR peak brightness and a faster response time great for fast action.
Sony X900F Vs Sony X850F: DESIGN
Stand; the two TVs have stands
Wall mount; the two TVs can be mounted on wall.
Borders; X900F has 0.35” (0.9cm), whereas X850F has 0.39” (1.0cm)
Max thickness; X900F is 2.76” (7.0cm) whereas X850F is 2.13” (5.4cm)
Max temperature; X900F has 94oF (33oC) whereas X850F has 109oF (43oC)
Average temperature; X900F has 87oF (30oC) whereas X850F has 93oF (34oC)
Bottom line: the two TVs have the same design features.
Sony X900F Vs Sony X850F: PICTURE QUALITY
Native contrast; X900F has 5089:1 whereas X850F has 894:1
Local dimming; X900F has local dimming.
SDR real scene peak brightness; X900F has 578cd/m2 whereas X850F has 371cd/m2
HDR real scene peak brightness; X900F has 894cd/m2 while X850F has 457cd/m2
Gray uniformity; X900F has 7.5 whereas X850F has 7.4
50% std. Dev; X900F has 4.335% whereas X850F has 3.555%
50% DSE; X900F has 0.165% whereas X850F has 0.190%
Viewing angle; X900F has 5.2 whereas X850F has 7.7
Black uniformity; X900F has 7.7 whereas X850F has 5.8
Native std. Dev; X900F has 0.923% whereas X850F has 2.113%
Total reflections; X900F has 3.5%, the same as X850F.
Pre-calibration; X900F has 8.9 whereas X850F has 6.7
White balance dE; X900F has 1.66 while X850F has 4.42
Color dE; X900F has 1.60 whereas X850F has 3.10
Gamma; X900F has 2.20 whereas X850F has 2.15.
Post calibration; X900F has 9.5 whereas X850F has 9.2
White balance dE; X900F has 0.13 whereas X850F has 0.26
Color dE; X900F has 1.33 whereas X850F has 2.17
Gamma; X900F has 2.19 the same as X850F.
Bottom line: X900F is better
Sony X900F Vs Sony X850F: MOTION
100% response time; X900F has 10.2ms whereas X850F has 3.8ms
Flicker-free; the two TVs don’t have flicker-free.
Black Frame Insertion (BSI); the two TVs have optional BFI.
Motion interpolation; the two TVs have motion interpolation 30fps and 60fps.
Bottom line: X900F is better
Sony X900F Vs Sony X850F: INPUTS
Input lag; X900F has 8.4 whereas X850F has 8.5
Supported resolutions; X900F has 9.6, the same as X850F.
Total inputs; the two TVs have 4 HDMI, 3 USB, 1Digital optical audio out, 1Analog audio out 3.5mm, 1 composite in, 1 tuner (cable/Ant), 1 Ethernet and 1 IR in. X850F has one component in.
Inputs specifications; X900F and X850F have HDR10, Dolby Vision, HLG, HDMI 2.0 Full bandwidth, CEC, HDCP 2.2, USB 3.0, variable Analog audio /out and Wi-Fi support.
Audio pass-t6hrough; each TV has ARC, DTS:X and DTS.
Bottom line: X850F is better.
Sony X900F Vs Sony X850F: SOUND QUALITY
Low-frequency extension; X900F has 95.14Hz whereas X850F has 119.87Hz
Std. Dev. Max; X900F has 6.81dB whereas X850F has 6.21dB
Max; X900F has 90.0dB SPL whereas X850F has 88.0dB SPL.
Distortion; X900F has 5.1 .whereas X850F has 5.6
Weighted THD @ Max; X900F has 9.787 whereas X850F has 22.734
Bottom line: the two TVs have the same sound features.
Sony X900F Vs Sony X850F: SMART FEATURES
Smart OS; the two TVs operate on Android TV versions 7.0
Interface; the two TVs are easy to use and non-smooth.
Ad-free; X900F has ads whereas X850F is ad-free.
Apps and features; the two TVs have apps and features.
Remote; they all have large remotes.
TV controls; the two TVs have TV controls.
Bottom line: the two TVs have similar smart features.
X900F is a better TV in this review of Sony X850F Vs X900F because it has a higher native contrast ratio, better local dimming, better black uniformity, better HDR peak brightness and a faster response time great for fast action.