Cost is also another one of those good indicators when buying from known sources...
EE *usually* in the $3 range and Ameraucana in the $18 ish+ range.
Some folks don't realize the broad range of acceptable blue "shades" that can be laid by Ameraucana... (from google)..
View attachment 2014719
See photos of the variety here...
http://ameraucana.org/Ameraucana Photos
I raise (breed) bantam Ameraucana in wheaten and lavender, but blue is one of my favorite poultry colors. While black isn't my fave, it's unexpectedly beautiful.
Not dissing EE, I love them and their variety of plumage and personalities.
ETA: Once this posted I was piqued with curiosity about what shade my background box was... A13 ??, from what I can see. Lol!