I have the M, R, and H plates in both open comb and closed comb. So far I have used the M1, M2, R1 and R2 (currently with two shaves in) and so far I find the M2 better than the R1 but it is close and the best one so far is the R2 for me. Not sure if or when I will adventure to the H ones but for me at least is seems like the open comb are nicer, give a closer shave and provide more feedback.