The US News subject rankings "are based solely on ratings by business school deans and directors of AACSB-accredited MBA programs". That seems like a good guide for PhD applicants but it's not very meaningful if you have a non-academic career goal. The QS ranking is a pretty good guide to MSc degrees, but [a] you seem to be focussed on an MBA and its criteria might not matter to you. Also, these schools are not fungible: WU is a great school for the Viennese job market, but if you don't speak German, maybe that's not a great school. So, start with your goals in mind and find the best available school for your goal.
The US News subject rankings "are based solely on ratings by business school deans and directors of AACSB-accredited MBA programs". That seems like a good guide for PhD applicants but it's not very meaningful if you have a non-academic career goal. The QS ranking is a pretty good guide to MSc degrees, but [a] you seem to be focussed on an MBA and [b] its criteria might not matter to you. Also, these schools are not fungible: WU is a great school for the Viennese job market, but if you don't speak German, maybe that's not a great school. So, start with your goals in mind and find the best available school for your goal.