I'm very glad I was able to find both of these, without one or the other, they wouldn't be able to compliment each another so well! Both of these castings are white Lotus Esprit S1s from the movie, James Bond, The Spy Who Loved Me. However, one is a submarine. The Retro Entertainment version is the submarine which features extra details, metal on metal construction, and moving fins. Usually Retro Entertainment cars come with real riders but this one being a submarine, it came with small clear plastic wheels which is fine by me. The mainline is the normal car version, and the details on it are decent for a mainline car. It's a neat set overall!