Also found this slide about another FT-derived base oil (it's CTL, Coal-to-Liquid, same method the Germans used during WWII, instead of using natural gas as the feed stock but the resultant stack is essentially the same):
You can see how the FT-derived base with 0.2% PPD treat effectively matches PAO (with no PPD), and how that compares to typical Group III's:
You can see how the FT-derived base with 0.2% PPD treat effectively matches PAO (with no PPD), and how that compares to typical Group III's: