to me, they are two completely different radios, they feel different in the hand, the steering wheels are different sizes, DSM1 vs. DSM2 and all the stuff thats been listed before. ONE is not better then the other, One fits the needs of one group and the other doesn't. Figure out what you want out of a radio and go with that. I chose the R and after the first race night on it, I am very please, I feel more at one with the chassis then I did with my last radio.