I own the EDC and EDT, and slightly prefer the EDC (but only slightly). I did not bring it with me to Boston, so I bought a bottle of EDT cheaply on the net (it in fact happens to be the vintage one, so I can comment directly on your question, got a vintage Vetiver too!)
The vintage EDT is a very fine fragrance, and a steal at that price. It has a strong blast of citrus to open before the powdery Guerlinade notes take over. In this respect, I find the EDC a little fresher and less powdery. Smells a bit "old" but very distinguished, and I'm happy to wear it as a 31yo.
I'd say buy it at that price. At the end of the day, the difference is small (not including the EDP) and every collection should have one bottle at such a cheap price.