Hen and Roo?
They both look like hens to me, they have light yellow combs not bright red ones. The combs are not particularly large and the legs aren't particularly thick. They both have short hennish tails, I'd say both girls.
1st is a pullet and the 2nd is a cockerel
hmm, you think that the second looks like a cock? It has an aweful tiny tail, and the legs are pretty thin. the comb is slightly bigger than the others but it is still pretty light and small to be a roo.
given the age of the chicks that comb is way to big for that age to be a pullet. plus if it was a pullet it also wouldnt have such large wattles already