Too funny. I’ve only ever had standard buff Brahmas, and they have often looked different from each other. So I was basing my opinion on what standard ones look like.I was surprised at how different buff brahma bantams look as chicks from standard buff brahma chicks.
Even though it’s too soon, I would guess that if one of them does turn out to be a boy, it will be the one with the fatter comb. And the other one whose comb looks kind of like a single comb is likely a pullet. It’s a pretty small comb for either variety. Just a guess until they get older. (Looks like a pea comb to me.)