I took a side by side screenshot of the wallpapers and showed an Apple store employee, he couldn’t see any difference.
I'm so sick and tired of these Apple store employees who can never see the difference between any two screens you show them. My first 11 Pro had weak contrast and a slight green cast to the display. Genius said he couldn't see the difference even though seven other people I showed could. My express replacement has much better contrast but is more yellow. Showed it to a Genius today, even compared it directly beside a display unit which had perfect whites and even under that perfect store lighting I could still see mine had more yellow and he said he couldn't. I immediately saw that the store unit was what I wanted mine to look like and he saw no difference. Like, I understand that these differences are not as drastic as night shift on versus night shift off or something crazy like that, but I'm not blind. If you look closely you can see they are different.