: I drove both of them on the Miata and several other cars. The R1R grip is a little bit better BUT the AD08R feedback is much better. The R1R is more like and ON / OFF switch regarding grip and the AD08R tells you what's going on 100% of the time. I was able to get closer to a 100% cornering speed with the AD08R on cars I barely know because of that. That's why I have a set of R1R that I got for free and still I paid for the AD08R and placed them on my Miata. I will drive the PSS in the near future, I've heard great things about them. For me, the AD08R is the best tire that I drove on, and as a car jurnalist, I drive & drift a lot of cars all of the time.
