Quote Originally Posted by Ynot View Post
I don't think it really matters too much
(admittedly, I've never tried it)

uninstalling Gnome (or any other DE) when it's in use will mean it's necessary to log out and log back in again - that's all

Using gnome
uninstall gnome
install KDE
log out
log back in
Now using KDE
Or you could, you know, not uninstall Gnome, and then you'd have both.