Anyone with silkie chicks knowledge/ sexing and breed

[Lleal90]

View attachment 1555701 So about a month ago I got my son these four silkie chicks for his birthday from a woman selling them an hour away off of Craigslist. Anyone familiar with what type they may be and possibly the sex? They were one week old, and our biggest named waffle was two weeks old. I’ve noticed not only the difference in their feathers, but also that two have one type of eye that looks big and black, and the other two have light eyes (more human like if that makes any sense)

 

[Brahma Chicken5000]

The first pic is a Naked Neck cross d likely a cockerel. The second pic is a Silkie mix and likely a pullet. Cute birds nonetheless.

 

[Kessel23]

Those are mixed breeds, they do have silkie in them though. I am not sure what gender they are yet.