XH90 ma 2 lub 3 hdmi 2.1 (różnie źródła podają, wyższy kontrast o 40% co za tym idzie lepszą czerń, lepszy local dimming.
Q80T ma tylko jedno hdmi 2.1 , wyższy HDR 550vs 700, niższy IL 15 vs 10ms
"For most uses, the Samsung Q80T is better than the Sony X900H. The Q80T has a faster response time, lower input lag, and it supports VRR, making it a better option for gaming. The Q80T also gets brighter in HDR content to make highlights pop and its reflection handling is significantly better. However, the X900H has a higher contrast ratio, better local dimming, and although it doesn't have VRR support now, it will come in a future firmware update."
https://www.rtings.com/tv/reviews/sony/x900h https://www.rtings.com/tv/reviews/samsung/q80t-qled
Nowy firmware w Sony to tylko kwestia czasu, źle bym sie czuł gdybym zarekomendował Ci tego Samsunga wybór oczywisty