I'd guess that number 2 is a roo based on what seems to be a larger comb and the color/pattern looks rooish to me. But I would wait a couple of more weeks and take nice comparison pics of the combs (head on)
Close... I always try to remember that both Ameraucanas ans Araucanas both end in CANA with the U coming earlier or U- CAN Sometimes they can be tricky to sex ..... usually though the roos will get much larger and redder combs and tend to have feathers that differ in color and pattern between...