All 4 below supposedly with HDR.
SM Appliances lahat yan.
The Skyworth units are running on Android Pie (9.0), have 2.5 gigs of RAM and have a better GPU than the TCL's.
The TCL P65 runs a proprietary version of Linux, has 1gig of RAM, and a 2018 model GPU. However, the TCL has a better panel and longer 2-year warranty.
The TCL 65P8US might be a better deal overall but I don't know what panel it has. There's an A8 version which I saw too but in Trinoma.
For guests and kids' rooms, the Skyworth would be my choice. For personal viewing and for bedrooms with existing AV setups, a more astute videophile may prefer the TCL P65.