Not sure where else to put this, but the guys at ScrewAttack, with help from the folks at Kanzenshuu, The Dao of Dragonball, the Superman Home Page, and the Superman Super Site, have put together probably the most extensive and exhaustive breakdown to finally settle the old "Superman vs. Goku" debate once and for all:
http://www.screwattack.com/shows/ori...ku-vs-superman