Here's an old thread on this topic: Genz Benz shuttle vs. shuttle 2
I did my research before purchasing a 6.2 last year (currently FS in the TB classifieds) and agree with everybody else that the 6.2 is a major improvement on the 6.0. These are great little heads. The only reason I'm selling mine is because I replaced it with a Shuttle 9.2.
As for cabs, I've played the 6.2 through my old Ashdown mini 12T and 10T cabs and my current fEARful 12/6/1. It works great with both.