But I will give one edge to Japan. I rate Western gameplay and worlds above Japan's, but nothing will beat Japanese writing:
Japanese Writers: Kojima, Takahashi, Sakaguchi, Kitase, Kato, Mikami, Miyamoto, Ueda, Kamiya, Nojima.
Western Writers: Levine, Druckmann, Houser, Pagliarulo, May.
Bonus points for anyone who can name all of the games these guys wrote without googling it!