The dior is lovely indeed. It is a smooth, traditional oud-rose accord, similar to others - now that most niche brands are coming up with theirs. Things like by Kilians Rose Oud or the new exclusive guerlains come to mind. But they are really not better than the Dior and cost the same if not more. Indeed, I cannot think of anything better in western perfumery.
I have smelled midnight oud only once, and, while I thought it was good, it wasn't as rich as the Dior. For cheaper stuff, in a different style, there are the ouds of Montale, like Black Aoud. But they are sharper, woodier, butcher, the overall feel is quite different.
I hope some of our middle eastern bners chime in with their view.