I kind of liked the Prestige, although the ending was a bit...stupid. Should I see the Illusionist, then? I noticed it doesn't have Cillian Murphy. Points against it right there.
The Prestige: Pros: Scarlett Johansson, Michael Caine, Tesla, a twist that kept me guessing. Cons: ****ty real magic.
The Illusionist Pros: Ed Norton, an almost realistic plot line. Cons: tragically predictable, only spends 30 seconds on the plot twist. Also, I was rooting for the prince.
In conclusion, if you have yet to see these, you're better off watching four hours of porn.