You know it has to be 100% GroupIV (PAO) because it says both "Made in Germany" and 'Fullsynth' on the front label. Laws in Germany won't let GroupIII synthetics claim Fullsynth for oil sold there, and that's a German label.
You can't go wrong with Ravenol oil. As for NOACK, this oil is 8.5%, very good, yet any MB 229.5 oil on the shelf is under 10%, so I don't consider it much difference. If you pay more than $5 per quart for this, you've paid too much, since Walmart peddles Castrol Edge 0w40 for that much and it is spec'ed about the same.