ohhh, a joke, now it makes sense

protected designation of origin is only for foodstuff, and only for quality and origin. You can do the same cheese with de same flavour in Rochester, it will be Rochester´s Cheese, a kind of Roquefort cheese, but never authentic Roquefort.

they have the same word

that thing is more complex than a simple term for a kind of cheese. It means an certain origin with a certain technique, process, and materials. A cheese made in Roquefort-sur-Soulzon, made with the original recipe, with native milk, and all the things that makes Roquefort-sur-Soulzon cheese a Roquefort cheese. PDO is a warranty of origin, and imposes lots of quality and manufacturing criteria to the manufacturer.