The confusion results from feed stores (and some hatcheries) indiscriminately labeling EE as Aracauna or Americana, etc.
I have learned how to tell the difference.
I already posted about Aracauna’s.
Ameraucana’s have a standard of perfection (SOP) and will always be sold by color: Black, Blue, Blue Wheaten, Brown Red, Buff, Silver, Wheaten & White. There may be more colors accepted now idk. They cost less than Araucana’s but more than EE. You can find them but usually only through breeders, few hatcheries have them.
Easter Eggers are basically mixed breeds with some genes from Araucana/Ameraucana.
That’s why they lay blue eggs.
But they’re always a grab bag of colors and often several colors on the same bird. And they’re pretty easy to find; most hatcheries have them as well as feed stores.
EE are great though because they’re inexpensive and fun because you get to watch them feather out and see what amazing colors you’ll get!
I hope this helps!