Don't waste your time with those things. It's probably a mix of all mentioned so far by other Rennteamers; updated packagind, some more additives in the oil blend, etc.

What I suggest is you refer to TFM on page 204 where it reads that ALL current engine oils are compatible with each other. Literally -and according to TFM- you can always mix different brands. You should only try to use the same brand when it comes to topping up between oil changes, but this isn't imperative as well.

Also, bear in mind, that Mobil 1 isn't the best oil in the world but an overpromoted business agreement between the two companies. See other recommended by Porsche oil in the attached pdf.

George