They will not.I appreciate the technical details and this discussion, but most people don't really care how the sausage is made. The bottom line is: Do the pictures on the 15 look better or not? If they look better, most people don't care if Apple used Old Bay seasoning to make them better or something else.
They will be 100% identical to the 14pro. No more no less.
If you shoot around 70mm they will actually be worse, if you shoot at 120mm it will be better simply because you could not do it before.
So it's just a matter of deciding if you prefer the 77m of pro or the 120 on the pro max. Quality use ZERO difference with last year.