The Bighorn's (both original and 2.0) are great all around performance tires. I have had multiple sets of both on various SxS's. From a pricing perspective, they could be overkill for those with more utility vehicles that just putt around a farm. 2.0's are softer and do wear a faster. Treadblocks are thinner as well, but they are about the lightest performance SxS tire.
With proper pressure, original Bighorns very well may outlast most Polaris's (sorry, couldn't help my self :)
I have some friends running the pitbulls and they really like them. Lot's of traction and, so far, indestructible. They are very heavy though, which is why I've stuck to the original Bighorns.