I have a E2 clubsport with the red badge,when I bought mine few years back now I remember looking at a couple E3 GTS’s with the yellow badge.You could probably contact HSV and they’d tell you

The different colour badges were because of the upgrades the car had, such as yellow meant top of range, the bigger brakes and wheels, leather seats, maybe sat nav, Red badge meant Factory standard features, black not sure, maybe the Black edition.