Color doesn't mean anything for this variety of chicken, and both sexes start with spur bumps. By the time the males begin crowing and the females begin laying, the spurs on the males may begin to grow. Spurs on females may even grow if they are very old. The "little bumps" are there for both sexes, however.
EEs are not a breed, they are simply a variety of chicken that lays blue and green eggs, and they come in many different colors because they are mutts or crossbreeds. I have some pretty EEs myself (for green eggs), as well as true Ameraucanas (blue eggs). I love them both. So many people are confused because most hatcheries don't even know what they're selling. They may sell you an EE but they call it an Ameraucana, "Americana," "Ameracana," "Aracana," etc., just because they don't know the difference. At least I hope it's that they don't know the difference and not that they're actively trying to trick people.
At this stage, all yours appear to be EE pullets.