Yes, I've seen both. Your claim that if they both came out in the same year that Slumdog would be "relatively obscure" while you agree that they're both similar is, as you would put it, just silly. I liked both of the films, but I'm not going to say that if they came out in the same year that City of God would have/could have won best picture and Slumdog would be obscure, because that would be wrong, silly rabbit.
Of course that's not what I said. I was saying they would switch circumstances if they switched release years. But thanks.