As a FYI, I was in an Apple Store yesterday evening and was able to check iPhone 11 (LCD) screens just out of curiosity and their calibration is quite different between models too. Some were less bright or warmer than others. Also they were slightly color shifting too by that I mean when you look at them on different angles you can see that either Brightness or Color are changing (saw some turning more yellow or other turning more pinkish, and for sure all less bright). I believe this will be less obvious than OLED screens but the iPhone 11 calibration is not perfect too.