Ms. Piggy, thanks for pointing out the other threads. they were helpful. and thank you, all, for your help.
I believe Fauve Barenia and Fauve Tadelakt are different (similar color) since I saw swatches of both in my SA's leather book, and the Fauve Barenia was shown under the "BareniA" heading and the Fauve Tadelakt was shown under the "Tadelakt: heading. I think Fauve Barenia is in fact the new name for Natural Barenia; it may be that Hermes has a new supplier for the special Barenia leather.