The different colors of Ameraucanas (I have 6 total) lay at different rates and are different colored eggs. I don't have hard data, but as layers I have to give the nod to the CCL's overall. They are the "best overall" for laying. Not that I don't love Ams (that's why I collect them, LOL). The truest blue eggs, consistently, are the Silver Ams. They are pretty decent layers too. The Lavenders are laying well now, but they take "forever" to get big enough to sex, the silvers are sexable quite early, maybe 3 weeks, but not as early as the CCL's (1 minute, LOL).
The other "breed" to mention is the blue egg black sexlink. Best overall layer because they are hybrids, lighter blue egg, but still clearly blue. If you like the look of a black Am, these are the layers for you. If I ever build a laying flock for pastured eggs, they will be the blue egg component of that flock (Cali Greys for white eggs and commercial red sexlinks for brown). That would be a pretty flock too, black, barred, and red.
The other "breed" to mention is the blue egg black sexlink. Best overall layer because they are hybrids, lighter blue egg, but still clearly blue. If you like the look of a black Am, these are the layers for you. If I ever build a laying flock for pastured eggs, they will be the blue egg component of that flock (Cali Greys for white eggs and commercial red sexlinks for brown). That would be a pretty flock too, black, barred, and red.