I like the larger icons in GL, and I like that Google Now is a swipe to the left. Also like that the folders are round with overlapping icons, rather than the "four in a box" folders in the stock launcher. Also like that the app drawer swipes side-to-side (like stock Android), rather than vertically, as with the HTC launcher. It's all pretty subjective. The nice part is Kit Kat give you the option to switch launchers on-the-fly in the personalize --> home settings, so you can try to see if you like it.