Congrats on your purchase. I have seen so much more Dior in Europe than in the US. Here, even Diorella or Diorissimo are available only in a couple of fancy dept stores. I was almost going to say that I've seen Diorama in Europe too, but I didn't pay enough attention to be sure.
I hope you smelled Vol de nuit beforehand, after the negative experience with the previous classic Guerlains. In any case, it is indeed much less unusual than AO. there are lots of orientals around, whereas AO's style is quite unique and little explored in modern perfumery.