How much did you pay? Post a pic of the other EE. It doesn’t have to be a perfect shot. Feed stores will order chicks for customers. It is possible, if you payed a lot more for the white one, that it is a left over from someone’s previous order. Talk to the feed store and ask what hatchery they get their birds from. Cackle and I think Meyers sell true Ameraucanas.Yes, she and her sisters (who didn't survive) were from a hatchery. She was more expensive than the other 12 chicks I got.
Just saw your pic as I was typing. That second bird is a typical EE.