Hi, I answered your PM but here you seem to have more queries, so here you go.
I ordered TCL curved in august in the prelaunch days as they were giving a cellphone for half the price with TV, I found traces of same model on russian websites and I felt it a good VFM as none other curved screen is available anywhere near to this price point.
The TV doesnt comes with a samsung panel, I guess. Since TCL makes everthing on its own and also supplies some parts to samsung thats wh amazon advertised it as samsung panel, I dont know tech whereabouts but this was a gimmick as far as i can sumup.
After curved I ordered a 49 inch sanyo panel (IPS) but I felt that one reall shitty as the blacks were so dull comparing with TCL and after spending two hours of calibrting colors the whole experience looked like its some second grade product and i immidiatel called amzon cc and requested a refund and it was approved, later they didnt approve refunds for sanyo models as shown on tv listing reviews for that model, and after receiving refund i ordered 49 inch non smart TCL, it was way better then sanyo, but still the quality cant match 48 curved. Theres not much price difference so I can only recommend the curved model without an hesitation. In this budget you can not have anthing better, since netflix works great as well in the smart features.