I tested both iphone side by side, the 11 pro max and XS max. As said by others in this column, the 11 pro max is warmer in its tones than the XS max and the pictures more yellow. One thing to remember is that no photographer publish his photo without post treatment on either photoshop, Apple photo , Lightroom or else. One could conclude that for a starting image, both 11 Pro max and XS max are very good tool and that the final result after post production will be of equal quality. The secret is in the post treatment and of course the technicien... 😉 the three photo below are from iphone XS max.