I'm testing these side by side today and to my admittedly uneducated schnoz, they smell virtually identical. The OJ Osmanthus is ever so slightly richer and creamier (Iso E super???) but other than that I am really hard pressed to find any difference between them.
This interests me greatly because I fell in love with Champaca when I tested it about a month ago, but the Osmanthus Interdite is half the price! I know lots of people get a strong leather hit from Osmanthus Interdite but it's quite subtle on my skin. I think perhaps it's giving Osmanthus Interdite the weight it needs to compete with Champaca.
I'm using spray samples I obtained directly from each house.
Anyone else had the chance to compare these two?