Except if the gui mentions anything in regards to GUI. Ubuntu and Kubuntu's system settings aren't even remotely similar.
That sadly makes Kubuntu a bit of a tough sell for a beginner who wants to primarily use the GUI route, since there's a guide for Ubuntu for almost everything but not for Kubuntu.
(Which sucks, because I like KDE way more. I of course use KDE, but that makes it kinda hard to recommend Kubuntu to a total beginner.)