I recently saw both of these.
I'll be brief.
I thought
The Prestige was intoxicating and intellectually stimulating. Did it always work? I don't know. But I was intrigued the whole time and want to see it again desperately. And I'll probably see it many times after that. Superb performances, too
I thought
The Illusionist had potential, but I also thought it was entirely too predicatable and not nearly ambitious enough. Good performances, but it left me unimpressed.
"One no longer loves one's insight enough once one communicates it."
The opposite of creation isn't war, it's stagnation.