If you're merely contemplating whether to switch to Linux in the first place, I wouldn't worry about the latest version of Gnome - they're released every six mo

If you're merely contemplating whether to switch to Linux in the first place, I wouldn't worry about the latest version of Gnome - they're released every six months, so these changes probably aren't going to be the decisive factor in whether or not to switch. I'd recommend Ubuntu if you don't really know much about Linux yet, simply because it's the most popular. It sounds like you do actually already know more and are interested in Gnome specifically, in which Fedora really doesn't modify it all that much. If you really want to try the newest Gnome release in particular, then waiting a month or so should give you a Fedora release that ships it.