What would be the advantages of that? At Ubuntu GNOME site it says "Ubuntu GNOME is a mostly pure GNOME desktop experience built from the Ubuntu repositories", but I'm not sure what that means exactly.
I am currently using Ubuntu 12.04 with gnome-shell installed. I am willing to upgrade to 14.04. Ubuntu LTS has 5 years support while Ubuntu GNOME has 3 years. That's what makes me think it would be better to install Ubuntu 14.04.
Actually, this question could be extended to any flavor of Ubuntu. Is there any difference between installing, let's say, Xubutu with the gnome-shell desktop and installing Ubuntu GNOME with xfce-desktop?