Is the PWM an issue for you on your other iPhones? Your 13 Pro isn't?
I regret to share, I took the plunge on buying a friends rejected 13 Pro (non max) and I really like it. As a video editor, the phone's video quality is mind blowing!!
That said, I love both camps and really am looking forward to my first Android refresh in 3 years. My Pixel 3 is still a damn good trooper, and is the ideal size for me so am a bit apprehensive about the bigger Pixel 6 when I already abandoned Apple's Max phones.