I think I can comment on this 1

, the S3 will never have the sharp turn in the GTi/ED30 has, maybe its the weight I don't know. The 4wd does come in useful everyday especially if you start modding

But the main thing for me is it isn't just a little better screwed together inside, its loads better. It was 1 of my main gripes with both the mk5 GTi's I had, they are not a cheap car yet the interior in my mind doesn't live up to its price tag. They look nice don't get me wrong but it will be interesting to see how they are holding up in a few years time, not as well as a mk4's is my guess.
Just my opinion having had both cars