"Americanas" are Easter Eggers (they lay blue or green eggs, but do not belong to any recognized pure breed.)
"Prairie Bluebell Eggers" are Easter Eggers too (they lay blue or green eggs, but do not belong to any recognized pure breed.)
For both types, I would expect them to have pea combs, come in a variety of colors, and they might or might not have muff/beard on their faces. That description fits both chicks that you have.
I do not think there is any way to tell for sure which type they were supposed to be. But I don't think it matters much either, unless you want to know so you can buy more of the same thing.