EE's do not always have green legs. Most hatchery stock indeed do, but not always, and homemade ones certainly won't if bred for other colors. For example, most of mine are slate legged. Green legs come from a combination of slate and yellow. Slate is a dominant gene, yellow is recessive. So green legs are always a good indicator of EE vs Ameraucana, as it takes more than just one oops generation to mess up a pure Ameraucana and get those green legs.
EE's often will have single combs due to the whole brown x blue = green thing, however, most of them should ideally have a pea comb like Ameraucanas, since it is linked to the blue egg gene. But, all that said, to the untrained eye it will appear like they have different comb types, since single combs can modify pea combs to be floppy, tall, spiky, lumpy, folded, etc.
