Yesterday I bought some free range organic chicken eggs from the nutrition department and cooked one up side by side with one from my recently started laying pullet.
The whites were noticeably watery/less firm due to age of the store bought egg, and was bigger. Mine were only a few days old on the counter top and can clearly see the two different whites, with the inner white significantly raised.
Cooked (had it over rice), they were both good, finishing the store bought egg first. The store bough egg had more whites to eat, but what put the nail in the coffin was the yolk from the back yard egg. Even though the yolk wasn't as big as the other free range egg, there was much more richness in color, taste and mouth feel to blow the other egg out of my mind as it glazed over the rice.