I'm a Roc guy, but keep a Buzzz in the trunk for long wooded courses.
They're just totally different discs. The best analogy I've heard is that the Roc is a midrange that thinks it's a putter; the Buzzz is a midrange that think's it's a driver.
That's a great analogy...captures my experience with roc vs. buzz perfectly. I have a Buzz SS and had to remove it from the bag. I had a difficult time judging distance with my Buzz. Often, the disc was going further than I intended to throw. The Roc on the other hand is much more controllable for me. I have a champion, super, and a few KC's. 9/10, I throw the KC's.