Quoted from Mk1Mod0:
Basically I am looking at the entire line of games that used the -17 and -35 MPUs. (A number of the earliest games used chimes.) Everything in them is the same, with the same plugs. (MPU, SDB, light card, etc.) From my limited research I see the same as you, that the plug-ins for the early sound cards are the same. The cards just got more sophisticated.