The 01 Cr motor is a good one, it has more bottom than the 02-04,cr 250's I cant speak for the 05-07 though. The 02 Rm I believe you will find turns better than the 01 Cr, shifts a little shorter than the cr, and is a little less stable on high speed chop, but anything can be fixed with the right tuner. The rm has real nice bark down low a good mid and a little short on overrev. I think the Cr's tend to hold up better. Having ridden both bikes a good bit I would have to wind up on the Rm myself but I ride fairly tight tracks. The cr is a very close 2nd for me and would prob pick it first for a big track. -the rm also seems to like to break shifter forks and footpeg welds,fyi. If you are tall, you will prob like the feel of the cr better.