Honestly for me it’s very subjective. With GNOME, I need to install and configure a lot of extensions to get it to work the way I like. I was surprised how many of these small tweaks and features are already part of KDE. Out of the box it’s a lot closer to what I want and the rest of the small customizations I want are just right there in KDE as options.
With GNOME extensions I always have to wonder “which crappy extension broke now, and what is the new one everyone is moving to/how to fix it”.
Just generally a lot less headache for me. I also could swear it’s more performant and generally feels snappier, but it’s so hard to tell on modern fast hardware anyway.