Hi.
Neither of those are roosters yet or will be for a long time.
They are still very young, and you should count your lucky starts. Once the switch flips and hormones kick in you will see both of those boys chasing a girl and grabbing her neck feathers while she screams and they mount her taking turns pecking her and other things. They will get the most docile pullet first and work their way up. They will not take no for an answer and you will hear screaming most the day long. Right now they are probably practicing with each other.
After they start to mature a little they will drop their wing and dance for the lady before trying to mount, at which point they also usually know how to accept NO for an answer. Shortly there after they will call the ladies to treats as often as possible. And it will be much later than that before the male starts to defend his harem.
Before that though, you can be assure that when a boy hears a pullet screaming, he will run as fast as he can to try and get in on the action. When they hear the commotion they know the girl is already caught. My very youngest who recently is at that stage tries to go into the egg box and pull the most docile pullet out to mate.
I am building a stag pen for a reason. We won't be butchering before 16 weeks and some much later. By 16 weeks my BFCM are trying hard to mate, while my SF aren't even thinking about it yet. So some breeds and individuals mature faster and act more aggressive.
So in reality, you might be thinking attempts at mating are bullying! They also tend to focus on the girls that are actually at or close to laying age as well. It's kinda like a young girl may start ovulating but isn't quite ready for those advances. The boys are ready a little sooner than the girls.
My version of aggressive would be pecking me or starting fights with everyone in the flock. Also, whoever seems to be your top cock, can and probably will change through out time. The pecking order is a very fluid thing.
Incidentally, are you planning on keeping both of these boys and for what reason? How many girls have you got?
Happy Christmas!