Depends on the ECU are used there is restriction on how much power you are able to gain
E 5 ECU are very restricted E4/E3 less restricted E2 and E1 anything can be done and results are great always
All depends on what ECU is installed
VW Audi for example is MED 17 is E5 ECU, ME 9 Is E4 then Me 7 are E2 Ecu.