Chile and Brazil in a South Atlantic dreadnought war

If the First World War did not happen and Argentina, Brazil, and Chile fought in the South Atlantic, who would come out on top?

Chile and Brazil would probably defeat Argentina, especially if Chile received its super-dreadnought and Brazil retained the Minas Geraes class.

The three navies can be compared through the capital ships their dreadnought race produced or was expected to produce. Chile gains the most powerful individual ship through its super-dreadnought program. Brazil brings the Minas Geraes class and an established dreadnought force. Argentina owns capable ships but less depth, so a Chilean-Brazilian combination is favored, with the exact result still dependent on when the war occurs and which ordered ships have arrived.