Yeah, different birds will have different size combs and/or develop at different rates. Yours is still quite large and red for that age and definitely still a boy. Sorry for the confusion.
Behavior really doesn’t mean much of anything especially at that young age. I’ve had scared cockerels and bold cockerels. I’ve also had cockerels not crow until at least 7 months old and others crow at 8 weeks and successfully mate by 4 months. And gender specific feathering doesn’t come in...