Why is this group so much smaller than the white one?

Because of which catalogues we have read so far. Six sites are parsed, four of them European, and the casting on those decides what this page can show.

Black gay pornstars (148)

Twenty-one men, and the shape of the group is one name plus everyone else. Dillon Diaz has more credits here than the next five combined, all of them on Man Up Films. After him the drop is steep: Jake Waters, Micah Martinez and Aaron Trainer sit at seven or eight scenes each and the rest are under five.

Almost the whole group is American and almost all of it was shot for two catalogues. That is a statement about which studios we have parsed, not about the niche: the big US brands that cast heavily here are not in our index yet, and this page will look different when they are.