I really can't tell, TG! I'm beginning to suspect that sexing chicks based on pictures alone is rarely certain!
I hung out with my bubbies for a good while today, and my assessments went something like this: pullet; hmm, cockerel; oh, that's a pullet; uh oh, looking awfully roosterlike; ad infinitum. I think I'm going to have to wait until I hear a crow or see some hackle feathers before I believe anything beyond what I want to believe. As of now, there are no typical rooster behavior signs, but with just 2, I don't have much of a comparison sample.
Teila, all my hens are fliers, and the bubbies are no exception. I'm not sure how this came to be - bantams are more natural fliers (which makes me wonder why yours don't fly), and I think they taught my Brahma, who is pretty hilarious to watch fly, but she will do it nonetheless. Rousseau, the frizzle, is the most flight-challenged, since her frizzle gene seems to have wrecked havoc on her wing feathers. Early on, I placed a 4 foot roost in the coop, overlooking the side yard/creek area, as sort of a challenge for them, and they all took it on in stride, and now it's one of their favorite hangout spots. So, it's very cute to watch them all fly over, babes included, from wherever they are in the yard, when I start shaking the scratch jar to bring them back to the coop.