Sapphire Gem Cockerel or Pullet please!

[NewYorkMama]

Hi there. I have 3 sapphire gem chicks (& three australorps) around 4 weeks old. This one though… their tiny comb/waddle is looking awfully red at this young age to be to be a girl! It’s more red than my other pullets who are a month older. Thought this breed was sex linked?? Here are a few of photos. The last one is the same breed, same age, different chick for comparison of comb size & color. Thoughts?

 

[JedJackson]

It's either a cockerel of another breed or a Sapphire Gem pullet that is developing early. Male SGs should have the white spot on the topside of the head and barring, but this has neither.

 

[FamilyOfSeven]

I’m not positive, but they look like males.