My dang gnu-nix forum bug has reared its ugly head again! Had to Google Kwin(KDE windows manager, transitioning into a Wayland compositor.) Gotta agree with Hallvor, like comparing pears to oranges, when you've never eaten an orange and already much prefer pears anyway. Someone would have to actually use xyz DE/WM and get somewhat familiar with them, before they can even form a valid opinion.
Ten mins of playing with one of them realistically doesn't cut it or give the chance to find out what they can do. What can be done to or with them. Doesnt matter I guess we all have plenty of choices.