When I look at the 3rd photo, I think the lighter one is a roo, just going by the comb and the feathers towards the tail, they look a little long. My EE roo started crowing at about 13-14 weeks, my bantam brahma at 8 weeks, and my barred rock at 18 weeks. You can never tell when they will first crow.
Ah darn. I think, based on your photos, I also have two roosters and one hen. Mine are only 3 weeks old, and two have already started to show lighter feathers than the other one. Also, they might be forming a crown already. I will post some pics once I take them.
The same was true for our EE that are now a year and a half. They started out looking like chipmunks with one growing a crown, but they all turned out to be hens.
Goes to show that nothing is 100%. We will wait and see.