That's really funny...I wore Vixen today and noticed for the first time that it was alot like Snake Oil. In fact, I thought that I had gotten them mixed up, but no, it was Vixen. I'm at the bottom of an imp that I ordered at the end of July, so I think you're bang on when you say that the similarity only emerges after aging. However, I like fresh Vixen as much as the aged version.