I myself only have experience with the QE65Q70R. I don't know the other TV.
However, I am personally completely satisfied with the model mentioned. The picture and sound reproduction are convincing and the functions I use work as expected.

Without knowing exactly what you want to use the TV for, it should be noted that the other model is a second-hand product from last year. According to the product information, the stand is also missing. For my personal use, I would have chosen the QE65Q70R. But if you want to hang the TVs anyway, it probably won't make any difference. For a price difference of CHF 250, the older model is probably a good choice - but as I said, I have no experience with it.