I’ve owned both, very easy to jump back and forth. I had 2 months on my 850 and just about 2 months on my Alpha now. Axys 850 great sled, still the best sled in technical terrain but by a slim margin. The 850 does make great power but so does the cat, with the 2020 upgrades cat has done their 800 will be on par with the 850. Cat is just plane fun if you are in a variety of terrain during the day, very palyfull and easy easy to initiate turns/donuts/sidehills. With the updated 2020 Axys aimed at being more playful and easier to initiate sidehills it will be a very fun sled. The Alpha has the best track in the business and carries forward momentum when sidehilling better then anything out there. I will say I’m more tired at the end of the day with the Alpha due to the heavy steering and if you ride marginal/wind crusted snow more often then soft snow the Alpha would not be my first choice. The Axys has better running boards, way better gauge, easier plastic/hood removal, and I think is an overall better built sled for fit and finish. The Cat is built strong and my only big complaint is the hood design as my sled barely runs on deep days, plus I’ve been getting a lot of snow ingestion as my intake has had lots of water in it every time I remove the hood.