Their combs might be redder in the picture than they truly are because of the lighting and it was in the 90's yesterday so possible flushing?
Definitely a possibility.
As far as the rooster suspect... Size-wise, he's about the same size as the BR.
I was asking about size, because I was still wondering whether that chick is a Golden Buff (pullet), or maybe one of the meat-cross hybrids. But I would expect a meat bird to be noticeably larger by now, so probably not that.