This thread may help you out. One big way to tell is just plain who you got it from - Hatchery? Feed store? Breeder who spells the name wrong? - Those are all Easter Eggers.
Another thing, as mentioned in the thread - Is leg color and feather color. Ameraucanas only come in 8 colors - Blue, Black, White, Buff, Brown-Red, Wheaten, Blue Wheaten, and Silver. They should have a full set of beard and muffs, and slate legs. Black and Blue are allowed black legs - But green, yellow, pink - Any other color indicates an Easter Egger. Also, Ameraucanas should only have pea combs.
Araucanas are also not sold by anyone but a reputable breeder. They are very hard to find, and should in most cases be rumpless and have distinctive ear tufts coming out the sides of their faces, but no beard. They only come in 5 APA recognized colors, but there are more. They include Black. White, Black Breasted Red, Golden Duckwing, and Silver Duckwing.
Also, most Easter Eggers usually come in weird colors like a partridge type in hens, a splashy tri-color or mock-wheaten color in roosters, and a couple other odd colors like blue-buff and red pyle.
My EEs have big cheek tufts, which I think is a trait similar to Ameraucanas and Auracanas? Is that right? Working on learning as much as I can.
