If this was 15-years ago, winning the regular season argument. However, let me try to explain to you it in easy terms: Your ACC schedule SUCKED compared to Duke's. I do not know how the cheats do it, but ever since the ACC expanded, UNC's ACC schedule was weak sauce compared to Duke's almost every year. You have only two halfway decent wins away from the dome: Miami (neutral) and Wisconsin (neutral). Duke has vs Rhode Island, vs. Florida, at Notre Dame, at Virginia, vs Louisville, vs UNC, vs Notre Dame.
Hey, since 7 to 8 losses is not a big difference (and it is two losses when it includes the ACC Tournament), and Duke just won the toughest conference tournament in America, you tell me oh wise one, which resume screams better success?