Newbie here (first post!).
I think Octavian goes off beam trying to display an encyclopaedic knowledge - see his comparison of Rose d'Arabie with Portrait of a Lady in the same link. I imagine many people who have smelled the two will be scratching their heads trying to get the connection.
I loved Royal Oud; it's eminently wearable and focused on the main note. But I found it too short-lived. Here are my notes from trying it out (in cool weather):
Wonderful, soft-spoken, round-shouldered oud that oscillates constantly between its sweet, hypnotic aspect and a drier, mature wood quality. There are few other perceptible note distractions and it doesn't have a bludgeoning power. I would have bought this like a shot had it not been for the disappointing longevity despite a liberal spraying – two hours of enjoyment and then another two as skin scent, and then it was nose burrowing in skin time to get the last remnants of the scent.