Brown eggs and white eggs are, nutritionally are exactly the same: about 70 calories, 6 grams of protein, and lots of of B vitamins. The only difference is that brown feathered chickens lay brown eggs. Farmers claim to feed them more and pass the buck onto the consumer. It’s all about perception, consumers think they are getting a healthier egg because of an inflated price on brown eggs. Size does matter in this equation, brown feathered chicken are bigger and require more nourishment than a smaller chicken that lays a white egg. The only other factor that might come into play would be what the farmer is feeding his chickens. At the end of the day there is not much difference but the hit on your pocketbook.