I think the darker could be a cockeral look at the pointed feathers on it's neck. Looks like the start of saddle feathers. I hope I'm wrong. I is still very young. The other one is a pullet.
Watch the second one. The comb is a bit flushed pink, but still small. If male, that will noticeably take off in the next couple of weeks growing fleshy and looking redder.
But color is even in both. I think you most likely have 2 pullets.