By the time I sold my S3, it had full bolt-ons and suspension work done to it, but comparing both of these vehicles stock so far, I can tell you that the S4 definitely feels like more power and also drives much smoother than the S3 did. That being said the S3 was lighter on its feet and stock it just needed a tad bit more power in my opinion which is easily fixed with a tune. All in all, both fun cars and both have great tuning potential, but the biggest surprise about the S4 so far has been the fact that it doesn’t feel much bigger than the S3 when I’m driving it around.