Depends on if it's manga or anime Akira
@LHWKnight: I know he doesn't have a body, that's why I said it made a difference. Anyway neither have a chance against Buu, the difference being that the anime version get destroyed because he can't move, and manga probably run away. Didn't the manga version create a universe of something though, I think I remember reading that somewhere.
Well in Manga Kid Buu is a Multi solar system buster in destruction since he is more than 4x over solar system, Higher level durability since SSj3 Goku cannot do anything against him. MFTL fighting speed with half of light speed flying speed
in Anime, Kid Buu is MFTL in fighting speed and flying speed, Much higher level of destruction and durability since he destroyed a galaxy in a few years