That's why it's expressed in pounds. What weighs more a pound of feathers or a pound of lead?
a pound of quail eggs is a pound of chicken eggs. You just have to crack a few more eggs. So you get the same amount of food out of the quail for less feed. a friend of mine made stuffed button quail egg omelets. Now that had to take skill cause a button quail is a tiny little 4" bird and it takes about 10 button eggs to equal a chicken egg. Here are 25 next to a standard chicken egg. http://img.photobucket.com/albums/v244/aqh88/quail/incubator/SANY0919.jpg
Coturnix eggs are much bigger. button and coturnix egg
They are nearly the size of a small bantam egg and it takes 2 of those to equal a standard egg so maybe 3 coturnix eggs per large store bought egg. I should have weighed one.
Quail eggs are a little different in taste than free range chicken eggs. Not greatly though. My friend described them as being lighter but I'm not sure exactly what that means. Now compared to a store bought egg the taste is really strong but compare my free range chicken eggs to a store bought egg and the taste is strong. I'm never eating another bland tasteless store bought egg again.