Kilo-class submarine vs Santa Fe-class submarine

Kilo-class submarine
Kilo class, Soviet designation Project 877 Paltus (Russian: Па́лтус, meaning "halibut", NATO reporting name Kilo), is a class of diesel-electric attack submarines designed and built in the Soviet Union for the Soviet Navy. The class was built until the mid-1990s, when production was switched to the more advanced Project 636 Varshavyanka variant, also known as Improved Kilo-class by the West.
Statistics for this Xoptio

Santa Fe-class submarine
The Santa Fe-class submarines were a class of three pre-World War II submarines, designed and built in Italy in 1928-1933, as part of an Argentine expansion plan for its navy. They were in service with the Argentine Navy from the early 1930s to the late 1950s.[citation needed] The class was named after Argentine provinces starting with “S”, as traditional in the Argentine Navy.