The eggshells are thicker! If a hen can do some exercise outdoors, get some daily sun, eat some bugs and be fed organic feed, it won't be on steroids and anti-biotic feed, plus it will produce a healthier egg. If it is not rushed and forced to produce eggs you will have eggs that are firmer. You are right about the content of the egg. They just look brighter and healthier. Amazing that we are so surprised by what good food looks like, eh?