[scratch113]

Given the mileage, go with the S5, definitely. I went from S4 4.2 to A5 3.0 TDi and their engines are completely different in terms of character. Adding a remap and Milltek to the 3.0TDi has significantly improved it, but you could argue that just the Milltek added to an S5 would step that on again, just in terms of exhaust noise.

 

[scratch113]

If it's the V8 growl you like particularly, I feel a call to Milltek is required!