I'm deciding between RS4 or B8 S4...
 

As far as the driving characteristics are concerned, how would you imagine the two cars will compare in terms of acceleration and handling? Should I expect the B8 S4 to drive similar to the S5 that I test drove?

No one here has driven a B8 S4.

I have, but when I got back I had to destroy the DeLorean. It's caused nothing but disaster.

I would say yes similar to the S5 but if the S4 has a turbo charged V6 then I would expect
 

better handling than the S5

LMFAO

B8 S4 > B5 S4?

Possibly - if there are no vacuum leaks or bad N75 valves
 

:)