Cockerel? Pullet? 6 Weeks old

[ParanoidAndroid]

I have 6 Chicks all from the same Clutch, so far 3 of them look like probably Cockerels and 2 look like Pullets. Then there's this one that looks like both of them?
First Picture is it's Brother and Sister for comparison, the 3 suspected Cockerels have already had Pink/Red combs and Wattles for about 3 Weeks now.
Which do you think it is?

 

[CascadiaRiver]

It's a cockerel sorry, the red on the wings is a male specific trait/color