I've taken a look at a couple PCLinuxOS editions before, but to complete the chain I decided to take a look at the main distro, which uses the KDE desktop environment.

The PCLinuxOS desktop. As you can see, it is colored in a much darker theme, unlike Kubuntu's blue everywhere. I think this might even be a theme for Kubuntu.
One other significant change is the lack of any of the Plasma stuff, and the fact that icons are on the desktop. The K Menu icon has also been changed to a PCLinuxOS buffalo symbol thing.

PCLinuxOS is, also shown above, a rolling distro. Meaning that you don't have to re-install your desktop every few months, however you have to remember to keep it up to date.

The menu used is more like the one in KDE 3.x. I like this menu more than the clutzy solution in KDE 4.x.

PCLinuxOS KDE still uses Dolphin as the file manager.

For web browsing, Firefox is employed. Even more surprisingly for a KDE-based distro Konqueror is nowhere to be found.

Here is an annoying windowing glitch rearing it't head: windows will sometimes only appear as a tiny box in the upper-left corner.