I've been on over 100 coasters and see how similar a lot of them are. Some rides are almost exactly the same. I loved Apollo's Chariot at Busch Gardens VA. While on it, I told my wife, "this is nitro". Same type of trains too! There are small differences but it's basically the same. I feel the more unique rides, the more a park becomes a destination. Being a huge roller coaster enthusiast, I look for "one of a kind" rides and will go to those parks just for that. Like the Jack Rabbit at Kennywood. Small park, not a lot of coasters, but they're all unique.