At the risk of arguing with Popa, I’d like to suggest that it is actually impossible to prove which school is better. (Certainly, US News didn’t do it.)
Well, I agree that US New’s criteria don’t necessarily mean a better education.
But, if we value education by the jobs you can get out of it, and we assume employers care about the US News ranking (which they generally do- at least in certain fields) then we can say that it does prove it is a more valuable education.