I don't know that I believe any defense is patently better than another because I believe it comes down to the aggressiveness or lack thereof in a given set on any given night but I'm not a big time coach or sports writer.
Regardless of that, I was at St. Louis' NCAA first round game against Memphis in Columbus and I assure you that, whatever the reason, that was one of the ugliest games I've ever seen. St. Louis pulled off the upset, however.
(Yes, I know we were playing in Nashville that night but I couldn't go, see, so I gathered all the Spartan fans in Nationwide to watch us take down their hated rival instead.)