Is Treasure Island and the mysterious island the same place?

No, Treasure Island and the Mysterious Island are not the same place. "Treasure Island" is a novel by Robert Louis Stevenson that centers on a quest for buried pirate treasure. In contrast, "The Mysterious Island," written by Jules Verne, follows a group of castaways who find themselves on a strange island filled with various adventures and scientific discoveries. While both feature islands as central settings, their plots and themes are distinct.