It depends who writes the story. The author will decide who will win.
If you mean win then Goku would win.
Superman. There's video where Goku vs Superman in Screwattack's channel in Youtube, it shows how strong Superman is and Goku's.
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Superman, unless you are talking about early golden age superman or post final crisis superman, in which case goku wins.
Depends on the version of superman you are using.
Depends on the version of superman you are using.
If you have read dragonball, then you would know yourself. Goku could easily beat the living crap out of Superman.
Depends on the versions.
Depends on which version of superman you are talking about.
Depends on the versions.
Goku is better than superman
they would probaly tie