Which of this 2 models should I buy?

dafrade

Hello, My LG Tv just stops working so I'm thinking to buy a new one.
I'm decided between this 2 models:

55UM7450PLA 55"

and

49SK8000PLB 49''

I already read a lot about the 2 models, but I would like to have opinions about it.
Thanks a lot for the help