Bismarck and Titanic are certainly different. Titanic is one of the "Olympic" class transoceanic cruise ships built by White Star Company under the control of American Morgan Consortium in the early 20th century to compete with British Cunard Company for Atlantic passenger transport. Bismarck was a fast warship built by blom Voss Shipyard in Hamburg during World War II.
One is a cruise ship and the other is a battleship; One is an American civilian ship and the other is a German warship. One is that the iceberg sank before World War I, and the other was sunk during World War II. How can these two be the same?