Bottom line: Which one is better?
In this review of Samsung Q6FN Vs Samsung KS9000, Samsung KS9000 is slightly better because it is great for watching movies as well as HDR content, it gets brighter and has less reflections.
Stand; the two TVs have stands.
Wall mount; Samsung KS9000 has VESA 400×400 while Samsung Q6FN has VESA 200×200.
Borders; Samsung KS9000 has 0.39” (1.0cm) while Samsung Q6FN has 0.35” (0.9cm)
Max thickness; Samsung KS9000 has Samsung Q6FN has 93oF (34oC)
Average temperature; Samsung Q6FN has 90oF (32oC)
Native contrast; Samsung KS9000 has 6820:1 whereas Samsung Q6FN has 6203:1
Local dimming; the two TVs have local dimming.
SDR real scene peak brightness; Samsung KS9000 has 511cd/m2 whereas Samsung Q6FN has 502cd/m2
HDR real scene peak brightness; Samsung KS9000 has 471cd/m2 while Samsung Q6FN has 524cd/m2
Gray uniformity; Samsung KS9000 has 7.8 whereas Samsung Q6FN has 7.5
50% Std. Dev; Samsung KS9000 has 3.194% while Samsung Q6FN has 3.029%
50% DSE; Samsung KS9000 has 0.159% while Samsung Q6FN has 0.189%
Viewing angle; Samsung KS9000 has 4.7 while Samsung Q6FN has 5.2
Black uniformity; Samsung KS9000 has 9.4 while Samsung Q6FN has 8.8
Native Std. Dev; Samsung KS9000 has 0.541% while Samsung Q6FN has 0.685%
Total reflections; Samsung Q6FN has 5.8%
Pre-calibration; Samsung KS9000 has 9.1 while Samsung Q6FN has 8.3
White balance dE; Samsung KS9000 has 1.04 while Samsung Q6FN has 1.62
Color dE; Samsung KS9000 has 1.50 while Samsung Q6FN has 2.62
Gamma; Samsung KS9000 has 2.23 while Samsung Q6FN has 2.17
Post calibration; Samsung KS9000 has 9.7 while Samsung Q6FN has 9.5
White balance dE; Samsung KS9000 has 0.55 while Samsung Q6FN has 0.19
Color dE; Samsung KS9000 has 0.30 whereas Samsung Q6FN has 1.42
Gamma; Samsung KS9000 has 2.21 whereas Samsung Q6FN has 2.19
Color gamut; Samsung KS9000 has 8.2 whereas Samsung Q6FN has 8.3
100% response time; Samsung Q6FN has 12.9ms
Flicker-free; Samsung KS9000 has 2.8 while Samsung Q6FN has 6.0
Black Frame Insertion (BFI); Samsung Q6FN has optional BFI.
Motion interpolation; they both have motion interpolation 60fps and 30fps.
24p Judder; the two TVs are judder-free.
Native refresh rate; the two TVs have 120Hz
Variable refresh rate; Samsung Q6FN has FreeSync.
Input lag; Samsung KS9000 has 9.1 whereas Samsung Q6FN has 9.6
Supported resolutions; Samsung KS9000 has 9.0 whereas Samsung Q6FN has 8.8
Total inputs; the two TVs have 4 HDMI, 2 USB, 1 Digital optical audio out, 1 Tuner (Cable/Ant) and 1 Ethernet.
Inputs specifications; each TV supports HDR10, HDMI 2.0 full bandwidth, CEC and HDCP 2.2. Samsung Q6FN supports; HDR10+, HLG and Wi-Fi support.
Audio pass-through; each TV supports ARC, 5.1 Dolby Digital and 5.1 DTS.
Low-frequency extension; Samsung KS9000 has 71.27Hz while Samsung Q6FN has 75.51Hz
Max; Samsung KS9000 has 86.6dB SPL while Samsung Q6FN has 85.6dB SPL.
Weighted THD @ Max; Samsung KS9000 has 0.353 while Samsung Q6FN has 1.156.
Smart OS; Samsung KS9000 operates on Tizen (2016) while Samsung Q6FN on Tizen Version 2018
Interface; Samsung Q6FN is easy to use but not smooth.
Ads; Samsung KS9000 is ad-free while Samsung Q6FN has ads.
Apps and features; the two TVs have apps and features
Remote; Samsung Q6FN has small remote.
TV controls; the two TVs have TV controls.
When we compare the two TVs in this review, Samsung KS9000 is better because it is great for watching movies as well as HDR content, it gets brighter and has less reflections.$ 1699.00