#2 definitely looks like a cockerel, #1 I'm not sure (guessing pullet). Hens can have large combs as well, but they develop later than roosters (more towards egg laying age). Do either of them have saddle feathers yet?
At six week saddle feathers would not be present. Usually shows up 10-12 weeks. Second one looks like a cockerel if it’s comb reddens anymore you have a cockerel. It’s pink for now as for the first one it looks like a pullet. I’d say update in a couple weeks.