eggs are homogenous in nature, so a blind test between two eggs can reveal the superior quality of one type of homogenous product. Especially when it is an egg, which is entirely "natural"

a chicken nugget is not the same thing as whole chicken, because it has many chemicals, additives, flavouring agents, msg, organ meat, etc and is then battered or crumbed and deep fried before being packed. It also has a different texture altogether, and is eaten with the hands which children find easier than using cutlery.

compare a child tasting two different varieties of dark chocolate in comparison to a milk chocolate with caramel filling, or two varieties of whole milk to chocolate skim milk, et cetera.