Absolutely. The beautiful thing about Linux in itself is just how wide of a variety you can find among the distributions. Sometimes people get fired up about this distro vs that distro, but I look at distros like I look at beer. You're all out having a good time, whether it's light beer, lager, etc. Live it up and have some fun.
PCLos utilizes the KDE desktop. KDE is a desktop environment. Gnome is also a desktop environment. Look at it this way - with Windows, you have just that. Windows. With Mac, you have just that. You're stuck with the interface that is pre-defined within the limitations of the OS itself. A desktop environment in the Linux world is basically the entire GUI interface sitting on top of the OS itself, making it easy to change between. Each desktop environment interacts with the operating system in a different manner, and each have their pros and cons. Gnome is what Ubuntu uses by default, and KDE is what PCLos uses by default. PCLos strives to mimic Mandriva, but also at the toot of their own horn as well. PCLos is what you would call a fork (of Mandriva) much like Ubuntu being a fork of Debian.
KDE is available on Ubuntu as well, but it is known as Kubuntu, which can be had @ kubuntu.com. I have a ton of respect for KDE and I really dig the interface, but Gnome tends to have a slightly better track record in the stability department and I personally feel it has a more accurate "business feel" to it, which makes it a good candidate for my work laptop. KDE 4.5 has brought even more stability to the table, but still has a ways to go before I jump in full bore with it.
I personally find KDE more customizable than Gnome. KDE is ridiculous with what all you can do. Gnome has a ton of options too with customizing, and often times more than enough to keep me plenty occupied.
So to look at the big picture, you can choose from dozens of distributions that each have their own benefits. Further building onto that, you can also customize which desktop environment to get. Like I said, everything has its limitations, pros, cons, benefits, but finding a scenario that fits your needs is the name of the game.