The two buffs look enough alike that they are probably the same gender as each other. So I think you either have two males, or two females. Given the size and redness of the combs, I'm leaning toward males.
Are you sure it was a real crow? There was another thread recently where someone posted a video of their "crowing" chick and it was not actually a crow at all, just a sound that pullets can make. You could watch the video and see if it matches what yours was doing:
https://www.backyardchickens.com/threads/are-any-of-these-hens.1572366/page-4#post-26767458
Yes, hens can crow. But that is relatively rare in adult hens, and even more rare in partly-grown chicks. The younger it is, the more chance that crowing means it is male.
Crowing hens definitely happen, unless we doubt the word of all the folks in this thread:
https://www.backyardchickens.com/threads/anyone-else-have-a-crowing-hen.1572015/
But I agree that a crowing cockerel is much more likely than a crowing pullet, especially because OP's birds are right around the age when many cockerels do start to crow.