<p>The first ranking isn’t based on prestige (which hard to measure), and the second is based on willingness to do web publication (or something like that). You want to do prestige ranking, you find a survey where subjects were asked to rank universities in order of prestige (if there is such a survey out there). Now, a good ranking of world universities would include such factors as the number of buildings unofficially named after William Shatner ;).</p>