>>43886131DP had an entire island, 4 legendary hunts, 3 mythical event ENCOUNTERS, and competitive online for the first time ever. BW had three new cities, 2 legendary hunts, one mythical event encounter, a looker sidequest that ties up loose ends in the story, and competitive online. XY has a beefed up battle tower, a new town where you can catch hidden ability pokemon, 3 legendaries, and a looker sidequest that doesn't explain much.
I'll take the DP/BW postgame over XY any day of the week.