Both will have different maps to begin with. When in open loop mode which IIRC is below 50% throttle the car can make some small adjustments to fuel. However in closed loop when you give it more than the 50% throttle (for example) , it will pretty much fuel like an ITR and at the full top end of the rev range the injectors will max themselves as they do on the ITR / SiR tegs....not sure if they do on the stock EK4 ecu.......although it shouldn't damage they B16 engine, it WILL make it run like crap.