These are all the possible bantam breeds from ideal :
Brahmas, Cochins, Cornish, Dutch, Frizzles, Japanese Bantams, OEGB, Sebrights, Silkies, Wyandottes, D'Uccles, D'Anvers.
Your first chick is either a brahma or a Cochin and I would guess Cochin based on the feather pattern.
The second chick...