Answer:
MGM started in film production, while Warner Bros started in distribution.
Explanation:
Metro-Goldwyn-Mayer Studios Inc or MGM was founded in 1924 for Marcus Loew, located at 245 North Beverly Drive in Beverly Hills, California, this company produce feature films and television programs.
Warner Bros. Entertainment Inc was founded in 1923 for Harry, Albert, Sam, and Jack Warner, this company has operations in areas such as film, television, and video games, In 1918 they opened the first Warner Brothers Studio on Sunset Boulevard in Hollywood. Handled finance and distribution in New York City. During World War I their first nationally syndicated film, My Four Years in Germany.