There is no known difference, unless the egg is immediately incubated by hen or incubator the fertilized egg never develops the protected covering the hen provides keeps it fresh whether it has the extra cell or not
I'm the opposition here a good rooster is your best ally in caring for hens
He can help egg production, mine has. What they do is like a family dynamic, my Roo will help the layers find extra treats, which helps to keep them laying
My rooster will call out to me when the girls want extra treats...