Suspense is a feeling of uncertainty and anxiety about the result of doing/performing certain actions. Suspense happens in any situation where there is a build up a big event or a dramatic moment. Mystery is an intellectual process of finding out a conclusion, Its mainly about finding out who did the crime?
A suspense movie is a movie that is supposed to keep you on the edge of your seat ex: Disturbia or Mr. Brooks. They are generally movies that have to do with murder. This is the Disturbia trailer:
A mystery is a movie that has a type of question in it that will be revealed or answered at the end e.g. Nancy Drew.mystery movies usually deal with crimes or fantasy type things.
Alfred Hitchcock was an English filmmaker and producer.
Alfred Hitchcock says that people often get mixed up between suspense and mystery, he says that they are two completely different things. Here is a clip showing Alfred Hitchcock talking about suspense:
He also talk about how to create suspense. he says that you must build up the tension and suspense by giving the audience information, never let the action take place surprisingly, because the audience only get a few seconds of shock and that's it, you must provide the audience with information slowly.
Here are two talks that Alfred Hitchcock gives that you may want to listen to: