User blog comment:SuperKidBuu/Who Would Win?/@comment-4109321-20121215061747

Buu, clearly. As one of the most powerful DBZ characters, he possesses way more raw power than anyone from FMA. He also has seemingly limitless regeneration, which is obviously not true of the homunculi. Gluttony's eating ability isn't really an advantage here since Majin Buu could eat him just as easily.