Right. Though they do share the genre, that's about it.
Trey Anastasio is an incredible guitarist.
I will say that I enjoy Big Wu shows more than Phish. They are local to my home state (MN), and we get along together well. They started out of St. Olaf College as a Grateful Dead cover band, but now have a large repertoire of original music.
http://soundcloud.com/the-big-wu/tracks?page=2
Check out MN Moon. And Kensington Manor.