I'd say the Si, still for the gearing, higher rev's, and better top end. but the turbo should pull harder til about 60mphs though, so I'm gonna have to be undecided.
I'd like to see the R18 win though!!

I've got an Si, but to have an R18 beat one would just be comical and I'd love to have the owner of the R18 talking shit!! the fact that his car that is stock at 140hp, is AMAZING that it can perform close to the Si. I'd love to see a video of this..