Vega's name is Balrog they used that name as an oxymoron because a Balrog is supposed to be a hideous monster and he's supposed to be "beautiful". And the Boxer is M. Bison a.k.a. Mike Bison. Balrog was originally based on Mike Tyson, but Capcom thought they would run into legal issues because of it so they changed his name, and the folks over in the USA thought that Vega was too soft a name for the final boss so they changed his name too. In the end they just rotated the names around. M. Bison(Boxer) ==> Balrog, Balrog(Claw) ==> Vega, Vega(Dictator) ==> M. Bison.