While they will all interchange, they are not the same...79-87 (minus SVOs) were 1" narrower than 88-93 at the control arm mount locations. The SVOs were narrower, but control arms longer for better suspension angles...less camber gain/loss through deflection. They also had a shallower mounting angle compared to non-SVO Mustangs (14.5* vs 16.5*). That being said, I'm not sure of the 94-95...I know they'll bolt up, but the 94-95 did have longer control arms IIRC.
citation: Mustang Performance Handbook 2 by HPBooks c. 1995