Looking for certain TV people want lots of options for controlling and customizing various aspects of the television including picture and audio correction, accessibility options including captions and spoken audio transcription, and even UI skins. Check this Hisense 55H8C vs TCL 55S405 review for being aware where all the options perform in the best way in H8C or S405 series.
Apparently, the Hisense uses a VA panel which allows for super dark blacks, which is partly how it achieves such an amazing picture. VA panels have their drawbacks - you sacrifice viewing angle, but if you're sitting directly in front of this TV, it looks absolutely amazing.
The TCL S Series 4k LED quality is the same as Hisense. When set in a dark room, blacks look deep and dark scenes from movies are reproduced very well thanks to the great native contrast ratio and the excellent black uniformity. When set in a bright room with more lighting, the S405 can't really overcome glare since it can't get very bright and can't deal very well with reflections.
The TV interprets HDR10 format, which is what most HDR sources use. You update the TV via wifi and it gets patched in. Both TCL 55S405 vs Hisense 55H8C are given the extremely low cost compared to similarly sized TVs and it is surprisingly high quality. The remotes of these TV are minimal, comfortable, and easy to use. Has a phone app in case you're one of the many people who habitually misplace the remote. The app does exactly the same things the remote does.
It is hard to compare Hisense and TCL as their design is basic, Hisense has a couple of nice touches, which help it to stand out from other budget TVs. The whole TV is plastic, but the bottom of the TV and the legs have a slightly nicer finish. The borders are quite thin and look good. The stand is quite wide. It is very basic but has a nice finish on the plastic.
The TCL 55S405 is better TV in this comparison. Check TCL 55S405 price