Fact is that a properly prepared race car will nearly always be quicker round a circuit than it's road counterpart
Take the Mini Miglias for instance they look like a mini and have an A series engine but do 0-60 in about 4 secs and you would be hard pushed to find anything road legal to keep up with them
I'm sure the same will apply to MINI's - The
JCW Club Sports are designed to be road/race cars - an unmodified 'S' vs a Club Sport well I'm sure someone will do it soon !!! - IF you were to strip a
JCW CS and take away it's road legal status ie slicks etc. I suspect the same would be true as for the Miglias ie any road legal MINI would find it hard to keep up
Now whatever is said about mini vs MINI years of technological advances have a distinct advantage - I would say that if both the Mini and the MINI have to be road legal and you need to keep up with a stock MINI 'S' you are going to have to do some fairly hefty mods