There are two main differences between Search Engine Land's Danny Sullivan and Robert Scoble: ego and talent. Scoble's got the ego, and Sullivan's got the talent. If search-engine optimization is your thing (and God help you if it is), Sullivan is your rock star. Scoble is his own rock star.. But Danny! What's with the Scoble-inspired whiteboard talk? Next thing you know Sullivan will be filming himself in his car, endangering all our lives.