IMHO the difference is that KDE took the classic Windows desktop as starting point and has developed it into something that's now actually better than the Win10/11 desktop. GNOME OTH might be trying to imitate macOS but if that's actually the case they are doing a very poor job (I spend most of my time on a Mac, but have recently switched from GNOME to KDE on my Linux laptop because after updating to Ubuntu 24 I was finally fed up with GNOME's UX only ever getting worse, never improving).
PS: switching from GNOME to a KDE desktop session was absolutely trivial and quick on Ubuntu btw.
PS: switching from GNOME to a KDE desktop session was absolutely trivial and quick on Ubuntu btw.