Ok I don't expect this post to make any sense. I've done some drinking tonight... anyways I bought a TCL 55" S405 I believe is the model number. It's a 55" 4k tv for $399. I bought it to replace my kids 32"" vizio that literally has mold developing inside it (from old house that didnt have insulated walls).
I decided to compare this TCL tv to my 55" 4k Vizio M Series in my family room, and my 46" Sony X700 something or other TV in my bedroom.
These pictures will not explain the story I'm sure, they are just for eye candy or whatever...
This is comparing the TCL (bottom) to the Vizio M series (2016, top). IMO the Vizio beat the TCL in almost every category. The TCL did have faster smart TV features thanks to its built in Roku support. Other than that, the Vizio M series was far superior in picture quality. Being just a casual living room TV, in most brighter scenes I would say the TCL was very poppy and looked good. When a dark scene came on, it was disappointing, until I remembered how much it cost.
So no surprise an M series Vizio is superior to the TCL, but what about an older Sony (I honestly cant remember the model number, if you really care ask and I can find the answer obviously).
IMO the Sony still looks better than the TCL, specifically in dark scenes. The Sony looked so good it actually has me wanting to compare it to my Vizio M series to see the difference. However, I have an Xbox One S hooked up to the Vizio for 4k content and its 11" bigger so I don't know if I'll ever compare the two. Pictures below show the TCL (below) vs the Sony.
In the end. The TCL is taking the place of the Sony in my bedroom. Strictly because of the size (55" vs 46") and the Roku really does run the smart tv features very quickly and the sony being so old has an archaic system that is terrible by todays standards. Plus the TV I didn't pick for my bedroom replaced a 32" vizio TV in my kids bonus room (play room type thing). The 32" was fine in that room, but honestly pretty poor PQ and AQ, I'm actually getting rid of it because mold keeps growing on it despite the fact I keep cleaning it. So I think it's inside the TV. I absolutely don't want mold and breathing issues in my new house, so the TV has got to go. The bonus room is quite a bit smaller than my bedroom, so the smaller TV makes more sense there as well.