Unless you're a seller, I think it's a little silly for things as small as extra scews, or an oval vs. a circle. The game content and artwork is still exactly the same. Why do you really need 2 copies of the same game, on the same system, with nothing changed in the gameplay?
For me, that's just extra money being spent on something I already have, when I could have spent it on a game I don't have or something else.