Audi S1 looks amazing and I will genuinely consider it for my next car IF it turns out to have the S3 turbo and not the GTI one simply because it will stage 1 map from 230 to 350bhp lol weapon and a half. But if it's the GTI turbo which I thought it was at first due to the bhp then it's not worth it, it's heavier than the GTI and not much faster 0-60, but the co2 is a lot worse so that indicates a bigger turbo I hope.
The cupra around the ring had brembo brakes and an ac delete, supposedly all to be offered soon although what mong would delete the ac from their new car is beyond me. Yes this obviously made it faster but given the deficit between the R and Cupra I'd suspect that even without these changes at a similar bhp and extra lightness without Awd, that lsd makes the cupra faster around a track on a perfect day.
Yes there will probably be other changes to the R you may have to make like injectors however for this comparison all I'm suggesting is that you Bolt on a R IHI to the GTI and then map correctly you basically create a cupra with better looks

which on those 3 sunny days in England will be faster than a R. In terms of maximum tuning potential you'd be daft not to want Awd if you get close to 400bhp however.