Can you see the comb on the black and white one? (Circled in the photo in the first post.) I can't see the comb on it at all, because it has its back turned to the camera.Don’t think the black and white one is a Sebright because it has a rose comb. It could be Silver laced Wyandotte.
Both Sebrights and Wyandottes have rose combs, so comb type is no help in telling those two apart.