When I ported my game Empire for macOS (see: https://apps.apple.com/de/app/empire/id1287139467?mt=12) to iOS (see: https://apps.apple.com/de/app/empire-mobile/id1465452819) I noticed a much nicer scrolling behaviour there. There are a lot of smaller and more fundamental differences in programming for these two operating systems, especially between AppKit and UIKit and animation is one of them.