I'm pretty sure the type R is the newer one. As far as differences, I'm stumped too. Although, the type R does say double QC passed. I'm not sure what that is though. Is it quality control? Anybody know?
teh ex ones are junk...i have two...but i bought them when they were the only ones out...the first speed is slow as a turtle and then 2nd speed is just as fast as the rabbit