Probably, but I think the reality is that in most real world scenarios, the S3 is going to be faster. Less fun, but faster.
Not sure whether the likes of the Leon Cupra 2x0 cars are much better at getting the power down, despite also being FWD. The come with a slippery diff of some kind out of the box, like the Mk7 Performance but they also get the big turbo motor.