Lanús is based in Lanús, Buenos Aires, Argentina, while Unión is based in Santa Fe, Argentina. \n2. Lanús's home stadium is the Estadio Ciudad de Lanús – Néstor Díaz Pérez, while Unión's home stadium is the Estadio 15 de Abril.
Lanús was founded in 1915, making it one of the oldest clubs in Argentine football, while Unión was founded in 1907.
Lanús has won the Argentine Primera Division title three times, in 2007, 2016, and 2016, while Unión has never won the league title.
Lanús has a fierce rivalry with Banfield, known as the Clásico del Sur, while Unión's main rival is Colón, with whom they contest the Clásico Santafesino.
Lanús is known for its strong youth development program, which has produced talented players such as Lautaro Acosta and Maxi Velázquez, while Unión has a passionate fan base known for their colorful displays and chants at matches.