Yeah, I'd run the Mav for a while, then switch to see the difference, and you'll definitely notice. I'm in the PC camp, but both are huge improvements.
How bad is the Mav? I rode an 09 with the mav and it cupped out in about 600km's. Then picked up a leftover '11 and after a year sitting on the showroom floor, the weight of the sled had already cupped the track significantly, so it came off and I switched straight to the PowerClaw 2.25.
One thing to consider if buying the PC is that they come in different durometers (rubber stiffness). Check country*cat on the web. 80 (soft) 85 (med) and there used to be a 90 (hard), so not all Power Claws are the same. I chose the 85 for the combo of powder and set up snow/braking conditions and it works well in both worlds. I'd give it the nod in set up more than powder and it seems to manouver the trees very well.
The PC is a direct replacement, for sure on the newer 2010+ sleds. No nub cutting or anything.
I did fully clip mine, and run scratchers. 2500km's and it still looks good. Even the hyfax is holding up.
BTW, the track change is pretty easy. No need to go to the dealer for this. First time took a couple of hours with 2 guys. THe reverse forks in the chain case are the hardest part, and it ain't too hard.
OTM