The speedmerchant is a better car, due to the small differences in its design. As baboon was saying the way the rear end pivots on the rev. 3 is much smoother and more consistant than on the crc. Also the old style front end is much simpler and actually handles better on carpet, not to mention its lighter. The ability to adjust the batteries is very nice as well, and it actually does make a differnce in handling.