It's definitely not an Ameraucana but doesn't EE make more sense than a lightly bearded white Rock with green legs and a cushion or pea comb? I'd need a front view to tell which it is but it's not a single, no points...
I have an EE that's almost white and has the lime green legs like this one does. Mine came from a hatchery so I know she isn't a Leghorn x Ameraucana. She just happens to look like one. Mine does have a huge beard but there are beardless EEs and some with a slight beard that isn't so obvious but...