For one or two person viewing, especially in a dark room (e.g. night-time viewing), I'd go for TCL C635 - VA panel with higher contrast, and likely 120Hz gaming (50" model seems to be 60Hz though) and sports (fast pixel response times). Will not very bright in bright room with only 330 nits. OS is Google TV. Best you confirm with seller (coz specs page is contradictory).
For 3 or more family members viewing, especially in bright room (e.g. bright room with windows or lighting), I'd go for Hisense U6H - likely wide-angle IPS panel with high peak brightness of 600 nits and 32 FALD zones, but limited to 60Hz gaming and slow pixel response times (bad for sports). OS is VIDAA U5. Best you confirm TV panel type with Hisense (coz specs page missing information).
https://www.tcl.com/sg/en/tvs/c635
https://www.lazada.sg/products/tcl-...-21-google-duo-i2444764089-s14484106065.html?
https://hisense.sg/product/u6h-55-4k-qled-uled-smart-tv/
https://www.rtings.com/tv/reviews/hisense/u6h