They are the same rim, the VT GTS had them in a different colour. Some called them Champagne, some called them Caprice Silver. The correct name is Capri Silver and it has a good hint of Gold. The Monaro rims were just a silver colour and they used a silver wheel nut which looked awful. The GTS used a steel nut with a black plastic cap. There are plenty of knockoffs out there for these rims, the spokes are often similar but the outer rim is fatter.
Mine have th hsv stamp on the back inside of the wheel so I think these are genuine but the centre caps I'm not sure as they do not have hsv stamp so how can I tell if the center caps are genuine or not