My GUESS would be the large red combs male, the small pink comb, female. But im NO EXPERT BY ANY MEANS. the red combs could mean they are coming into lay. My B.O is about their age and looks like the one with the pink comb. For what its worth, she was sexed female at the hatchery. Sorry i cant help more.
I will try get better pictures later. They all pretty much look alike except the small pink comb. They were suppose to be all girls and the pink comb is much smaller almost half the size. We thought she was just not getting in for enough food but thinking could have 3 cockerels and 1 pullet.