Little turbo= low to midrange power, big turbo= midrange to high rpm power, except! modern turbochargers are developing at a similar rate to engines, the very turbo laggy response of cars such as an old Saab turbo, or Porsche 911 ( early 3.0/3,3 turbo which gave a power curve like you had been hit up the ar*e by an inter city express train) are over, modern turbo engines have very little lag. I reckon if you put Mr Average in a 2.0T A3 he would'nt even be able to tell it was turbocharged (it's that good!!)