Help! What breed is this chicken?!

[PapaZhan]

My wife purchased some chicks this spring. We have 3 different breeds. Two pairs of them are definitely what they said they were, but the 3rd breed, we aren't sure is what we thought we purchased. They have grown to be about 3 times the size of the other two breeds when as chicks they looked identical. They were supposed to Ameraucana, but they sure don't look like the pictures we have looked at. Anyone that can help us out, thanks in advance!

 

[Leahs Coop]

Looks like a Cornish Cross

 

[Ol Grey Mare]

For clarity....are these photos of two birds or two photos if the same bird?
Second photo shows a cornish cross, meat bird.

 

[PapaZhan]

Thank you. The white one are the ones in question, as they were bought the same time and age as the little Rhode Island Red next to it. We have determined that the Cornish Cross (meat) is what they gave us by mistake and they are going to provide us with our Ameraucana's soon. Thank you all for your assistance.