Here's my update:
Went to Lord and Taylor today specifically to compare the Unforgivable and Multi-Platinum. Sprayed both cards at the same time and smelled, then kept the cards to evaluate later (now).
The original Unforgivable was notably spicier initially, while the Multi-Plat was a bit brighter and cleaner. Other than that, they were indistinguishable. Multi-Plat bears absolutely no resemblence to SMW for me.
Now that the cards have dried down, the Multi-Plat has much better longevity, it seems. While the original Unf is almost gone, the Multi shines through, basically unevolved from the inital spray.
And one more thing - Millesime Imperial and Unforgivable are quite different. So are Cool Water and GIT. Enough so that to claim that they are interchangable is an insult to the scents and their wearers. Cool water is GARBAGE compared to GIT. If you can't tell the difference, I'm sorry, but you're in the wrong hobby. I know that's a confrontational statement, but I'm really serious. The only comparison that could be made would be a very stale, dulled and evaporated bottle of GIT is in the same ballpark of Cool Water. I suspect that many people who find the two similar are comparing stale GIT to CW. Fresh GIT blossoms into an incredibly resolute, complex, fresh pallette while CW reminds me of a scratch-and-sniff sticker. I'm smelling them side by side as I type this and can't believe that some find them identical. Sorry, I don't mean to hate on CW wearers, but I've heard so many people try and degrade some of our favorite fragrances for some of the most stupid, unstudied reasons...Making ridiculous generalizations. The exact same thing can be said for the whole XS/Himalaya comparison, MI/UNF, Joop!/OS, and Mugler Cologne/OV. I've got to stick up for my scents.