At the risk of repeating what may have already been said elsewhere, WICKED is a charming piece of packaged work, designed for the tourist trade by providing a lot of splashy special effects, gorgeous costumes, a fun set, and a bland but listenable score. Everything is lovely to look at. It's inoffensive and therefore an easy sell to large groups like, oh, I dunno, the Republican National Convention. But once you start stripping away all the flash, there ain't much there, guys.
Q, on the other hand, starts from the premise that it ain't much to begin with and lets you grow with it. It's got charm, wit, and a cohesive style, unlike WICKED's inability to pull all of its creativity into a single stream. I seriously doubt either show will make it into the regional theatre market (I dont know many companies that would want to tackle WICKED, and Q is a little too New York oriented to play in the Heartland), but Q stands a better chance of being remembered at all than WICKED.
"That duck was a sexual toy, and it was on display!" -- an unknown Nashville town leader