[KobaltBlau]

Let me see if I can help a little:

With EFI systems, It is very important that the injectors used are the correct flow rate, because the control unit makes the assumption that they will flow a certain amount if kept open for a given amount of time (like 400cc/min or whatever), and based on that opens them for a time period to get the amount of fuel the ECU thinks is needed.

With CIS and MFI for that matter, the flow rate is not controlled at the injector, it is controlled at the fuel head and MFI pump respectively.

For this reason, I suspect but cannot prove that the US and euro injectors are the same. They are just meant to spray properly, while the fuel head meters the correct amount of fuel.