Which university is considered more prestigious?

Prestige is not relevant. You should ask yourself "Which school is the best fit for me?" The Official MBA Guide, a free public service, can answer that question for you. You can also use it to compare starting salaries of graduates. Last week the Wall Street Journal reported that the median starting salary of 2010 MBA graduates, as compiled by GMAC, the organization that administers the GMAT, was about $79,000 not including sign-up bonuses which had a median of about $13,000. That means that half the graduates earned less than $79,000 and half earned more. Starting salaries of bachelor degree graduates are much lower, showing that on average the MBA pays off well. Stay with AACSB accredited schools and you should do better than the median.