Technically, the virus mutates every time that someone new gets infected. That is why it is so hard to create a vaccine for it. So, there are countless different forms of the virus itself technically speaking.
However, there seems to be 'Magic Johnson HIV' and the HIV that everyone else gets. For some reason he is still alive and it's not like the drug cocktail he takes is different from that of many others who were infected after him and have already perished.