The S3 is over styled and doesnít flow well from front to back.
That's it, you hit it, it's over-styled for sure.
If the cabin was a bit bigger then the front and rear wouldn't look so out of place. And if they had the money to redesign the rear as well as they did the front, oh my, we'd all be crying in our beer.
If I'm 100% honest, getting an S3 in the states to drive legally wouldn't be that hard because NO ONE is looking for it. Hell, they don't even know what it is.
1. Buy salvage S2
2. Buy really nice salvage S3 and have it imported for parts.
3. Fix S3 and swap the vin from the S2 onto it.
No one would know, they would both be "parts" cars, and honestly, no one would care. As far as most would be concerned, you're just changing a '69 Corvette into a '79 Corvette. Even the engine would pass the sniff test.