fuselage window regulators – power vs manual

i didnt know the answer to this question - are the window regulators different between power and non power window cars ? ive never looked.
by that i mean, can pw motors be installed on non power regulators ? to put pw into a car that didnt have em...
i couldnt answer for sure but my gut tells me no, that my friend would have to get a complete system from another car that had pw.
anyone have the answer ?
tx
mark
Author: marko