Balrog, Vega, and M. Bison have their names cycled in the English version, likely because of English Balrog's Japanese name "M. Bison" was similar to "Mike Tyson", and the two of them are boxers. So to prevent legal issues with Tyson, the English version cycled their names in the Street Fighter 2 game, because their names in the game was an actual image instead of text and so was easier to cycle their names than actually edit all three of them. So JP Balrog became EN Vega, JP Vega became EN M. Bison, and JP M. Bison became EN Balrog.
Because most of the artists here are from Japan, they're using the Japanese names, hence EN Vega here is actually Balrog, and Danbooru have preference on the source material, detailed under here: balrog