Burn in is only an issue if you leave the phone on the same display for hours on end like display phones in retail stores. For normal users burn in hasn’t been an issue for years.Apple OLED is worse. Samsung gives apple the B grade panels. Color shift off axis is extreme, color temps are trash, uneven screen tints etc.
OLED in general is worse due to pentile subpixel layout, PWM flickering, burn in concerns, and lower lifespan.
PWM flickering only effects some people. It doesn’t effect everyone.