My guess is that the NT-01s will be quite a bit stickier than the Rs-RRs in ultimate grip, and also not get 'greasy' as quickly on the track (one of the complaints I've heard about them for harder than street use).
The NT-01 was designed as a
track use tire from the get-go, and NOT as a street, or even specialty autocross tire, hence the 100 tread wear rating.
BTW; I have the RS-RRs on my summer wheels (215/40-17s on a 17x8 Pro Race 1.2), but have not open tracked/TNiAed them yet, so cannot confirm or deny their 'fault' of getting greasy under max attack use.
(One cannot reach their limits on the streets/in the canyons
without losing one's license.
![Wink [wink] [wink]](/images/smilies/wink.gif)
)
The noise they generate above 30 MPH makes a full mudder tire equipped coal rollin' bro peckerwood truck seems dead silent by comparison, but, i have gotten used to it at this point.