I might just be proving myself wrong, but probably should mention that there were specific rider shapes, which were more unique to that guy on which ever brand he was on, but all the other normal shapes are used throughout.
Antihero - Cardiel Huffer shape, Raney shape, Robbie shape, Kanfoush shape
Krooked - Ronnie shape, Anderson shape
Real - Ishod twins, which were also adopted by Bobby Worrest for Krooked
These just came out on Real too, so I guess if they are popular there might be more of them, but I guess wait and see.