The Prestige's my favourite too. It's absolutely amazing, thanks to Wolverine, Batman and Nolan. The pain, magic, beauty and danger shown there is just so real! (except for the last part, but we can let that slide maybe...)
The ending does require some explanation though. Other than that, it's so much rewarding to watch it than NYSM, but still, both the NYSM movies are cool too. They're for a different kind of mood than Prestige, so the two can't really be compared. And also, they're predictable. Like come on, I knew Hulk was a suspicious character...
Finally, for the record, my favourite movie
about magic (ignoring what 'magic' we're talking about) will be Doctor Strange.