I haven't tried an RS4 but have been a passenger in one and the very very light engine does make for epic handling. It feels so balanced and turns in so damn quick. Thats what my m8 enjoys most over his s3 the turn in. Oh and I think the RS4 is a very very pretty car, more so than the s3 but is it best part of 20g's better looking? probably. Not a car i'd buy but the boxter s blows away every car I have been in for feeling balanced and I have only tried the older generation.