Sigma 15 round SW-40 magazines?

I just bought a Sigma 40c Compact and I know that mine is a bit shorter in over all length but dont know if the grip is the same size as the full size older Sigma's.My main question is if the older 15 round .40 caliber magazines will fit my Compact models grip or not and its alot of money to spend just to find out.Any help is greatly appreciated.