If you are planning on getting them to resell them, just so that you know, I doubt you will have much luck, since the current version is really good (and some even prefer current to the vintage, so I would test them both if you can).
The difference (I think):
Vintage, iris is stronger on the top, woodier in the base.
Current, iris toned down on the top, cocoa ramped up in general. Longevity and projection slightly superior to vintage.
When I'm done with the vintage, I am going to be happy to purchase the current formulation (which I slightly prefer).