Compare it to switching out the surface of the table you play boardgames on - different surfaces might feel differently, look differently, but ultimately all serve the same purpose and a game board will work the same on all of them. So really, it's mostly about finding a desktop that you like.

(We can go into details about differences, but for starters, this analogy serves well enough)

KDE is bot a way to play games, it's more of an entire desktop. If you miss having navigation bar at the bottom or a desktop full of shortcuts, try KDE.