Dolphins will win in a close one.
I believe the Dolphins Wildcat will run all over the Saints. You cannot call it a gimmick anymore. Against a top ranked Jets defense the Phins ran it 17 times for 107 yards and the game winning touchdown. When you run an offense over 1/4 of your plays and even depend on it to win you a game with only second remaining it is far from just a gimmick. I don't think the Saints from seven is good enough or tough enough at all to stop it.
The Dolphins have a lot of pass rushers like Jason Taylor, Matt Roth, Joey Porter, and Cameron Wake. The Giants you could probably say the same thing about except there secondary is banged up which is why i don't think you'll see Brees do what he did against the Giants against the Dolphins.
Dolphins win 24-21.