alt Hacker NewsI think I noticed lower latency, more consistent frame pacing (recent-ish improvement in KWin) and a more "solid" feel because everything in a frame is synchronized. On X11, you can have things like border and contents of a window not matching exactly while resizing. An early principle of Wayland was "Every frame is perfect", which is clearly reflected in how e.g. window resizing works.
my experience us sadly the opposite. when I'm recording gameplay with OBS with x11 and xfce I have roughly a 7-9ms frame render time and with Wayland and any desktop env it creeps up above 16ms, which means I can't get a solid 60fps.
in all other cases other than gaming and recording, Wayland has been a delight.