So, that BR looks female to me, but I think the other one from the other photo looks male.
Barred rocks are an auto-sexing breed which means that you can typically tell at hatch what sex they are with certain traits. Females should have darker legs, more black feathers and the white spot on their head will be more defined and smaller. Males will have yellow legs, more white feathers on their wings, and the white spot on their head will look like it is running down their neck.
A lot of hatchery stock might not adhere to those traits, especially the spot being defined, but you can usually still use them to tell you something.