One point that I didn't see discussed is the 4WD system. Based upon how and where you use it, this can be an important factor.
Is each axle open, or lockable? If lockable, how is it locked in -- manual or automatic?
For example, some of the sportier UTVs like a Rhino or Teryx have locked rear axles. You cannot open them. Others like the Mule or Ranger have a "turf mode" that allows you to unlock the rear axle. A locked rear axle not only increases at least the perceived turn radius, it also will really tear up your lawn as it tries to make sharp turns. On the other hand, if it is open and not lockable, one wheel will easily spin while the other does nothing.
The front axle has similar effect. Many of the sportier UTVs have an open front axle that can be fully locked in for short periods of time to pull you over a log or rock. The ones with manual control over this locking (such as the Teryx or Rhino) put the driver in complete control of this feature. Most of the more utility UTVs have an open front axle that either do not lock, or use some kind of automatic locking function. Some of the sportier ones have an automatic-locking front axle, which while easier to use, gives the driver less control over it.
Your needs and intended use will determine how you evaluate and give value to these features.