JemV7 vs UV
There isn't a quality difference between them. Its mostly aesthetics.
I owned a Jem7VWH. I wanted a seven string so i traded it for UV777BK. They are pretty much the same (feeling wise and i think similar sounding) guitar with a string added. Of course, I like the way the universe looks better.
If you are going to use the seven string [wisely] then I would definitely get the Universe, no question.
For more info, look at the post in this forum, its rather recent so its either at the bottom of this page or the top of the next page of posts, I think its called "Which is better: Jem7VWH or UV777BK?
p.s. that guy ended up getting a UV777BK