American Gamefowl are very broad. They do have a bantam variety often called Minis, or Miniature American Gamefowl, but they're very rare.
I am working on a line of Minis, that's not bantam though. Body shape, & stance are distinct from the rest that exist out there, so there's no confusion...
Rooster is a Henny Brown Red, strain, or variety of American Game will be tricky to identify since alot of them share alot of similarities to one another.
Good clues they have though, is the white shanks, & modified pea combs, as a few strains have the trait.