Wow, a lot of comments added in the 23 hours since you asked me this question!
I'm probably still too new to the RR's to comment a lot (1 weekend), but I did set new PB's both days on them - could be the "new" though. I felt the R888R's were similar or slightly better than the NT-01's, and I believe the RR's are a notch better still. Also, these have ~4/32" tread vs. ~7/32" on the other two, but hoping lesser tread movement and wear offsets the lack of pure depth. I noted the Grassroots Motorsports table for these 3 Toyo tires seems to make sense, with the bottom line that the RR's are just a bit faster (B+ rating over B).
I have a buddy that runs RR's and Hoosier R7's on his supercharged Miata, and he says he can get times just under the Hoosiers on them. For my HDPE use, I'm looking for the sweet spot with speed, cost, and wear, and hope these strike the balance!