I'm not certain on the identity of the top chick; with those feathered legs it might be a Silver Laced Cochin. The bottom chick is probably a Barred Rock, although since you got an incubator clean out, it could be a male Black Sex Link chick which look virtually identical to Barred Rock chicks.
x2Wow, ultraflora, you are so right, they do look very similar! I would consider it very lucky if I got a BCM! I'm just going to keep my fingers crossed that it's a girl!
I'll have to keep an eye on the black one, for sure. I'll post more pics when they're a little older Thanks everyone!