And much better gaming specs such as VRR, near complete HDR capabilities, ...
Multi monitors are better supported, more customization (albeit it's harder to configure and get to the point you want sometimes).
It's not just color variants of the main interface 😇
I'm thinking about switching as well for those reasons but I'm disappointed on the NixOS support of KDE. Gnome is configurable through dconf at least for a kinda NixOS way.
So far it has been nice. Though I have nearly broke the GUI because the customization is so deep. I enjoy that aspect but it can be frustrating and I can see that being bad for someone who doesn't know what they are doing.
edit: also thanks for saying it looks nice I spent way too much time putting it together