Okay, you convinced me to participate.
I did no manual mode selection, no adjustments, only just a tap to focus on some.
Comparison 1: iPhone X:
iPhone 15 Pro Max:
Comparison 2: iPhone X:
iPhone 15 Pro Max:
Comparison 3: The rainbow is being created by a prism on a window. iPhone X:
iPhone 15 Pro Max:
Comparison 4: To showcase
@ChoiMinji point. This is at night, the horizon light is city light pollution. Fun fact, it’s the Mississippi River.
iPhone X:
iPhone 15 Pro Max:
I went further and used the (5x) telephoto:
If it wasn’t so late and freezing out, I would have gone home, brought back my tripod, and tried to get a clearer capture as I was so impressed.