@Arden I believe that is it. The A1 configurations do have some variation on muffler orientation (flat or upright) depending on the layout of the exhaust desired by car owner (down exit toward ground, single or dual exit at rear).
Also, when Kirk (Vintage Speedster) was building my car in 2014, his engine builder had a smoking deal on a ceramic-coated A1 system that would fit my car. It wasn't made specifically for a VS Speedster which is why is hangs a bit lower and more exposed. Kinda gives the car a hot rod look.
A1 systems made to fit VS specifically, are built to be tucked up more under rear valence. Here is a visual comparison. Fellow SOCer Rene 'Dutch' car on left with VS specific system. Musbjim car on right with exposed system.
So far, I have 35,000 miles (56,000 Km) logged on this car.