The setup is flawless. 9/10. Do you see how these two things maybe contradict each other? Oh I see, it’s so that you could have The Prestige’s twist be one point better in the rankings. The Prestige’s twist is good enough that you don’t have to devalue Memento’s just to make sure The Prestige gets the top spot. Maybe next time do a 1A & a 1B. Or just use different words.
This list does show you that Christopher Nolan is (usually) quite good at misdirection & twists. I’d love to see how M. Night Shyamalan’s twists stack up against each other (especially since he makes a point to do one in every movie). Obviously Sixth Sense would take the top spot, but I’d be curious to see where the others rank.