Are you a Roo or Hen

[Its_Julia_Chicken]

I have 2 white silkies that look identical. One has always been heavier and bigger body. I don't see any streamers on their heads. The tail feathers are puffy but have long feathers too. This morning one was singing and egg song, very loud, louder than I expected (my EE has a deep voice). She is in the nest box so I'm waiting to see if there is an egg. My question is does the other silkie look like a boy?
Picture 1: I believe us the girl, excuse her dirty head she was eating pumpkin
Pictures 2-4 are the sibling that I'm wondering about

 

[JacinLarkwell]

Looks female. Age?

@LadiesAndJane

 

[Its_Julia_Chicken]

I believe 6 months. I think we goth them as day old back in the beginning of May

 

[Its_Julia_Chicken]

I tried to get a picture of the comb. I don't feel or see spurs just 5toes and an ankle. Picture 1-3 same bird that I'm hoping is a hen.
Picture 4 is the girl who laid this morning
picture 5 is her egg and 6 is her egg in the Middle