Surely you guys have some opinions on this. I will say that I have used both of them and you can't go wrong with either one. I also have used #66 along time ago and liked it for what it was. Your definitely going to get better durability out of the poli-seal or the PwS than you will from the #66.
I haven't used the Poli-seal, I have it on the way though... but from my readings is that poli-seal is more abrasive than PwS, and PwS is a better paint cleaner. So they are both essentially AIO products, but both have their unique strengths.