The white one is a male. Your other rooster is called Calico (three distinct colors without a particular feather pattern. The partridge one is a female.
They are meat birds one male one female. I am not sure of the cross they used to get them, but they are very similar to CornishXRock birds, but have something with barred feather pattern in the mix.
I am pretty sure both are hens. The first is a definite hen. She has a weak Partridge pattern which makes her very easy to sex. The other one looks like a hen as well.