Backyard chicken eggs for me are much richer and fuller flavor. I also keep Black Copper Marans and those eggs are delicious.

Go here: https://www.mcmurrayhatchery.com/chicks.html and click "good/better/best" for egg production.

Note the wide variety. When you're doing a backyard chicken coop, you can pick whatever you want, for whatever reason (Rhode Island Red for hardiness, say, or a combo for variety). So not only do you have feed variation, you have breed variation, which can contribute to taste differences.

You also have freshness, as you use the eggs within a day or so of laying.

During the summer I was getting ~9-10 eggs a day, and we probably averaged eating 6 a day - so besides the size and taste, a big thing is that unwashed eggs last a long time.

In my experience they taste richer. The yolks are more orange than yellow.

Not the author but for me the taste is obvious. It’s like the difference between the cheapest eggs and the pasture raised you get at the store.