I've seen that comparison before.
It seems UD and PP are similar in many areas, but each have strength and weaknesses.
IMO Mobil 1 Extended Performance and SynPower look like the class of the oils tested (besides Amsoil, of course). SP is a little weak on TBN, otherwise it stacks up very well with the two extended drain oils on everything else. Makes sense - the used oil analysis show SP to be a great oil, but not for extended drains.
I have some UD (5 qts) and a lot of SP (40 qts). Not sure which I'll use in the next oil change in the Vibe. I might go with UD and save the SP for the Equinox because it has a DI and Synpower did well on the oxygen uptake test, while UD didn't. SP also has a better NOACK.