Well, I would certainly go for the RS5 (but perhaps I am biased) - roomier, prettier, classier, faster and V8 roar with DCT. Mind you, the 1st AMS test of the TT RS is okay, but measured performance is perhaps not quite what some expected: 1495kg, slalom 67.6 kmh, 12.9L/100km, 0-100 4.7s, 0-160 11.5s and 0-200 17.7s...