2007 Audi A4 Avant 3.2 S-Line Road Test

A3, A4, what's in a name? It's only one digit out; there can't be that much difference. I recently tested an Audi A3 2.0T s-line, and I was quite impressed with the car. When I delivered it back they handed me the keys to an A4 3.2 S-Line. It was exactly the same color, white, lovely! It had pretty much the same overall look as its little brother the A3, and I thought to myself "what's the point, how much difference can there be besides maybe a tad more space and a little extra oomph"?