First off, pullets don't start to turn red in the comb till they are almost ready to lay eggs. At 6 weeks old, a pullet would still be many months away from laying. Secondly, do you see that darker shade of blue both are starting to develop in the shoulder/wing area? That's a male specific trait of the Blue gene.
Both are 100% cockerel.
Both are 100% cockerel.

