There are 32,768 storyforms in Dramatica, but a storyform isn’t a story, it's an argument. An infinite number of stories can be created from the same storyform.

Two writers working with different subject matter might not even realize they have worked from the same storyform. There are probably thousands of stories that have been done that would match some of the more commonly selected storyforms, and it's doubtful that a reader would ever even recognize that those stories are making the same underlying argument.