Here is a video from ATV Illustrated on their review of the new 2011 Polaris RZR 900 XP.

Here is another video made by Polaris that shows off all of the features of the new 2011 Ranger RZR XP 900

Dirt Trax TV has a good review on the Camoplast track kit being used on a Polaris Ranger.

Polaris is now selling parts directly to the public without having to go through the dealer. Here is the link to their site.PUREPOLARIS.COM

This video is produced by Polaris, but I still think it is an interesting comparison between these two machines.

This video review from MotoUSA is pretty good, it looks like they were able to abuse a RZR 4 during a year of testing with minimal problems.