There both good starter quads. The Z250 is a auto clutch five speed. The Raptor 250 has the manual clutch five speed. The Z250 will be easier to ride because of the auto clutch. The Raptor 250 is going to be faster. If you want something faster look to the 400 or the 450 class quads. Unless you plan on racing stay away from the KTM and Cam-Am because these quads are sold as race ready quads and they cost a lot.