>Top forgeries are so similar that it often takes a team of experts independently examining a piece until the fake is detected.

And even if it might be difficult to tell apart, it isn't literally the same thing.

>Are you seriously trying to claim that the reason the original Mona Lisa has value (vis-a-vis a high quality forgery) is because of the minute tangible composition of the paint?

I'm not sure how you concluded that is what I said. I never made any statement as to why it is valued the way that it is.