Take a look at the towing capacity of both machines, the Cat's is 1050 lbs. and the XP 850's is 1500 lbs.! That's a 450 lb. difference! The Polaris frame is stronger than the AC's also.
I don't have anything against the AC's, they seem to make a good product but you did say in your post you wanted to use your new machine to pull and plow with.
The AC is faster off of the line but that's about it.
Overall IMO the Polaris XP 850 is a better machine!
And yes I probably AM biased because I have one and have had no trouble with it for almost a year now!
Take care and good luck!
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2009 Stealth Black XP 850- ATV Guru Brush Guards, Hand and Thumb Warmers, Hand Guards, A Fender Bag and Front and Rear Storage Boxes. 60" Glacier plow.
"I predict future happiness for Americans if they can prevent the government from wasting the labors of the people under the pretense of taking care of them." Thomas Jefferson"