Yes I have access to Porsche tech manuals as my Dad is a retired VW/Porsche/Audi Master Tech.

The spindles made many changes because as the calipers, ball joints, and hubs changed so did the spindle to mount these.

The struts basic shape is the same but the Porsche (late) strut is larger than the VW one. The Porsche springs have a larger O.D. than the VW and in simple terms the older the 944 got the componets got bigger, brakes became huge, ball joints went from 17mm to 19mm, etc.