I could care less about FF94 even after hearing snippets from it, so I won't delve into that. As for the Hulk v. X3? X3 only had one track that was actually catchy, and to me that's "The Last Stand". Everything else is sort of iffy. Hulk was just one giant musical masterpiece, not unlike Spider-Man (undoubtedly the benefit of Danny Elfman's involvement), in my view. The two don't compare.
My vote's for Hulk.