Okay. there are these different kinds of gear groups. campy veloce, campy record, shimano ultegra..

If i bought a bike with Campy Veloce, does that mean I would get the same gears as another campy veloce bike? the same granny gear and the same speeding gear? or is that a separate entity? I'm not talking custom bikes.
I'm talking more of off the shelf types of bikes.

Thanks