You could get everything on a vert that you could the Mach 1 but the rear spoiler and the words Mach 1. You could get the stripes on any model.
You could get the 429 CJ and SCJ along with the HO and CJ and Q code so not much difference except no roof and vert is heavier most times.
In 1973 all the Mach 1 option got you was
Trim rings and Hub caps that came on every car.
Dual Racing Mirrors.
Competition Suspension.
The color keyed carpet with the plastic insert.
All vinyl bucket seats which came on every car.
At times the racing mirrors came on the verts so you are down to Comp. suspension, the plastic piece in the carpet and the tape lettering for Mach 1 is only difference in the Mach 1. Not much there.
Everything else was an added cost just like on the Vert.
Just shows you what a piece of tape will do for the price of a vehicle.
David