not sure how the others are as far as drive-train but the polaris is belt driven and if you get it wet enough it will slip like crazy
100% why I went with Honda. All shaft drive, no belts to worry about. And, quite frankly, it's a Honda.
I actually went into it with the intent on buying the Pioneer 700. But, I hunt a lot of pretty tight places, and like the narrow stance of the 500 better. Seats two grown men just fine, and I put a bed on it. Also switchable between automatic or manual transmission.
But...everyone should get what they think will serve them best. What's best for me isn't best for the next guy.