Well, if you talking about onroad 1/10 scale racers. They have the rs4, which is the first one, the rs4 2, which is the second one, and the rs4 3, which is the third one. The rs4 and rs4 2, i think are not to much different. The rs4 3 is when hpi started using a shaft drivetrain instead of the belts, that were used in the previous models. That is the major difference when it comes to the different rs4's.

Yours, in terms of performace, should be about the same as all of them, as long as you have the same parts in each car. The rs4 3 ss model comes with a 2-speed transmission, unlike any other rs4 previously offered by hpi.