I just don't know why the American version of AW

C has different named COs and units than the European version. Why do they want to confuse us? Couldn't they call them all the same? An example of this:
Will (America) - Ed (Europe)
Brennen (America) - O'Brian (Europe)
Rig (American) - Mobile Workshop (Europe)
Duster (American) - Fighter (Europe)
Fighter (American) - Interceptor (Europe)
WTF? Yeah, I live in Spain and got the European version and get confused with the CO names. It's kind of frustrating -.- Anyone knows why's this? Wouldn't it be easier to name it all the same? I just don't get it.