The difference between a 20,000-ton cruise ship and a 20,000-ton cargo ship is that they are different in nature. Cruise ships are passenger ships carrying passengers for tourism, while cargo ships are merchant ships carrying goods for trade. The original meaning of a cruise ship refers to a large passenger ship that sails on fixed routes and regularly on the ocean. In international practice, cruise ships refer to large luxury ships on the ocean, while cruise ships refer to sightseeing cruise ships in rivers. This needs to be distinguished.

Freighters are mainly cargo-centric, and the transportation they carry include bulk carriers, container freighters, as well as oil-carrying freighters and natural gas-carrying freighters. Ships mainly refer to modern ships powered by mechanical wheels, which allow people to trade between different parts of the world.