Best teams, or best tournament teams?

By this I mean that the teams that might win 6 out of 10 meetings during the regular seasons might lose 6 out of 10 times to the same team under tournament conditions. Some schemes seem to fare better in tournaments. For example, teams that depend solely on 3-point shooting or defense usually go down, because they do not have a Plan B. On the other hand, teams that are tough defensively AND have something on offense to go with their shooters usually do well.