I have a new 10 m8 162, just shy of a 100 miles. Have had cats since 05, last year rode a 10 m8 153. Rode with a 163 pro yesterday both clutched about the same but with different results. 2 riders within 5 lbs of each other, similar skill set, 7 out of 10 times the cat would pull the poo on the hill, side by side the cat had a tad bit more speed up the hill. I'm not trolling or picking a fight here, I'm here to say after putting 10-15 miles on the pro I want one. I can do anything on my cat that I could on a pro, but the fun factor of the pro was off the charts. I'm currently working with a couple of dealers on getting out of my sled and into a pro. I would say that most riders compare sleds for point and shoot capabilities, I'm not one of these guys, I go for fun factor. This sled is off the charts. If I don't end up with one in the next couple of weeks I won't ride one till next year, cause it was a drag getting off it and back onto mine. If it holds up Polaris not only raised the bar but they changed the game IMHO. Two thumbs up Poo!