Sorry, I meant S3s as that's what comes stock on a 1LE. I don't have any scientific data per se, but I've improved my PB at 2 tracks thus far with a 1LE all stock vs my C5Z on NT01s (same power levels). So in general I don't think that S3s give up much (if any) pace to NT01s. The latter may last longer and be more consistent thru-out their life, but frankly I would not drive either tire beyond 6 days or so in case of rain on public roads going to/from track.
I had tried Cup2s and I don't think they are any faster vs S3s and cost me double...I have RE71Rs on now but haven't tracked them yet. From some sources these might be a bit faster, yet (here) they are $500 more per set. This means a "free" set of S3s for every 3 sets of RE71Rs based on simple math. Personally I'd rather spend the same money and have fresher rubber
Then again, if RE71Rs wow me then it might be the tire of choice for me.
We will see, as I really liked the S3s pace, handling and wear characteristics. And did I already say they are cheap lol? I had thought about Trofeo R but again the price is very high and longevity and rain performance questionable.
Bottom line I think the S3 is a superb tire. If I wanted to cut seconds vs tenths off my pace then I'd go straight for Hoosiers/slicks. This of course means either a tire trailer, or a car trailer. Been there done it and now love the simplicity of just arriving and driving with my 1LE and still being able to hang with the big dogs. NB a member just did 2:11.2 on S3s at the Glen which is very fast. Brand new to the car so he ran it in PTM Sport 1. This pretty much means the S3s will do 10s in a less restrictive Race mode/all off. That's rather incredible and frankly anything beyond such capability is like splitting hair. Unless one goes for the slicks. Just IMO of course. Cheers!