>>41271902You need both (or at least two) games to access the difficulty settings, so you might as well emulate and import save files of both games to unlock stuff for either game and pick it.
Black 2 makes more sense storywise btw, whether for stuff like Heatran's mountain being cool as opposed to filled with magma (the lore for that mountain is that Heatran wanted a place to "cool" off), or the fact that in BW1, N's goal was more of an "ideal", and Hilbert/Hilda telling him that he was wrong is more of a "truth".