The problem is the first picture has been took at straight angle, and you can already see the shift. It's really, really bad, and definitely not acceptable.
I see that too in your photo and I think it is not acceptable but it is typical, at least I almost never found good one. I've had this issue with iPhones since X and I have done several exchanges attempting to find a decent one. If I recall it was seventh iPhone 12 Pro that I could accept and even that had still slight difference between top and bottom of the screen even at straight angle. For me issue with these panels is that testing with TT and NS at 100% (slider to the right all the way) using white test patterns there is either some part of the screen pink and/or top and bottom of the screen have different tint and or brightness. Also using other test patterns with lower levels like 50%, 25%, 10%, 5% some panels have tint in some part of the panel.
BTW. What test patterns you used in your photos and what settings? Looks to me at straight angle more like just bottom of the screen being darker, but no strong shift to pink on the top (just very slight).
Can you take one photo with white test pattern using TT and NS on and maybe even try with NS turned to warmest?
Our 15 PM's become pink on the top around DI and then down either left or right part of the screen. In G9N pink area was just a bit larger than in G9P.
They do no compromise on the price, we don't have to do any compromise on the quality.
I agree but I guess problem is the way OLED panel is manufactured in large sheets and ones cut from the middle are good ones and edges more or less have issues. Cost of panel would go up and I'm not sure if production is even high enough to meet that demand.
I have another one at home, which has a G9N screen. It has some green shift, but it's a lot less agressive and the colors look better, it has more pop.
But the camera is less sharp on the main lens as well!
I also noticed our G9N panel had very nice and warm colors compared to G9P, but P was maybe a little bit more uniform in bright images, but with dark images it was hard to say, N might be even better then, so it was more or less pick your poison type of situation since I did not want to go again that many months long exchange roulette. Like you listed above, there are other things that can be bad than just a screen. With our 15 PM I briefly tested cameras and there was no big difference between them but I think 12 Pro had somewhat easier to get sharp and bright photos indoors with not so good lightning.
You have good battery in both? Here my another issue with my G9P is that it came with worse battery. There is noticeable difference in battery health and was right out of the box. Both came with Desay battery.