When I rode the 2013's at Island Park, I jumped on the 2012 600 to directly compare it in the same conditions as the 800 and was very impressed with the overall power and fun factor of the 600. It was a big surprise to me that the 600 was so capable!
rode the 2013 800 yesterday, nice package....better feel, nicer handling from last year....for fun i hopped on a 600 (2012), absolutely loved it...not quite the pull in the steep and deep, but the fun factor was sweet....area rep, not nameing anyone, said there would be a pro 600, belt drive....i had an 800 3 years ago, liked the sled, but the engine went away with only 400 miles on it...only got to ride it again once late in the season....the reputation of the 600 is a very good engine, an slp pipe, some clutching and you're knocking on the door of an 800...and i wouldn't pipe an 800 for fear of losing the warranty of an already suspect engine...i'm waiting for the rest of the manufacturers to show their stuff...but the 600 is looking good...