Hard to tell from these photos. I think the male? on the right is a hen. By that age, the males should be substantially larger than the females. Also, the makes breast feathers should be showing some black trim while the females are all white. Compare the breast feathers on the left male (with the black edges) to the breast feathers of the right male? (no black edges). Females tend to be lighter colored overallbut your tom doesn't have much color, so maybe the line that you got your birds from just isn't very dark.