Just going for the panel quality, I'd go for the U79. You'll need a bit of tuning after you get it (I've posted a guide on that thread). Then get the firestick 4k.
The frame is definitely a better TV than the U79. However, the usual price of that is 85k, and I won't spend double that of the U79 on it. If you can get it for 75k and you need a 120Hz panel, it's definitely a great TV. From a panel quality standpoint, the frame is about the same compared to the U79. The major benefit you get from Frame is that the UI is better, you get a Samsung TV, it looks great and you get 120Hz panel if you're going to use it for the PS5.
I'll make the decision process easier for you:
- Can you afford 76(on sale)/85k for the frame easily? If yes, go for the frame.
- Do you need 120Hz panel for PS5 or high-end PC gaming? If yes, go for the frame.
- In all other cases: go for the U79 and get the firestick 4k in Diwali sale.
U79 is much cheaper with almost the same picture quality. I own it and the image quality is truly excellent. For HDR performance, it's even better than the Frame due to higher brightness and FALD.