Please Help Sex this Easter Egger!

[saghareggs]

Hello! I have posted before, but I have updated pictures and hoping for help!

This americana (easter egger) is just over 7 weeks old. I bought it as a pullet, but the comb is looking mighty dark to me for seven weeks in comparison to some of my mom's americanas! Do you think this one is actually a roo?

Edit: It's the white, black and brown bird (in the right corner of the first image).

 

[Painted Calls]

I don't see anything screaming cockerel.

 

[Yep I Talk To Chickens]

I think its a pullet

 

[3mile]

I'd guess pullet