Re: On the face of it
The difference is that Unity from the start was not designed as a coherent environment to be useful and even convenient, but rather as a widget collection to look well on screenshots and induce warm feelz in the fans of certain other OS. (e.g.: ubuntuforums.org/showthread.php?t=1745415&page=2#15)
Admittedly, I'm a Xubuntu fan… from the day Unity thing was dropped on us, give or take a few hours.