Cochins or Brahma bantams?

[Chicky Mama]

I'm wondering if these 3 peeps are Banty Brahmas or Cochins?

I have a Lrg lite Brahma chick but she's all white. Im not sure if the one is also a lite just banty in size or blue Cochin.

 

[Chicky Mama]

Duh,comb differences. I said it'd been a while.