I breed and show light and buff bantam Brahmas only. I was able to indentify Spitman's bird as male because it has well marked male saddle feathers.
SarahIrl, I would not be much help as your birds are neither buff nor light. BigM is the go to man on Brahma genetics. Again my knowledge is confined to lights and buffs, specifically bantams.
Tuesdays chicks, I'm sorry, I don't remember the bird your speaking of. If you could tell me where to find it, or post a new photo, maybe I could help.