Brazil is the warmer. The Equator passes through northern Brazil.Argentina's northern border is against Brazil's southern border.
different becuse they have two different climates
Chile, Argentina, and Australia are all countries that are located in both the Northern and Southern Hemispheres.
Ecuador Colombia Brazil
The greatest part of Brazil is in the southern hemisphere, with just a little bit of Brazil in the northern hemisphere.
Argentina is one of the two southernmost countries in South America, the other being Chile. Argentina stretches from about 22° S (Bolivia, Paraguay and Brazil) to about 55° S latitude (Tierra del Fuego). Northern Argentina is the center of the narrower southern half of South America, between Chile to the west and Paraguay, Brazil, and Uruguay to the east.
Southern definily
The Gran Chaco extends from Bolivia and Brazil through Paraguay into northern Argentina.
Uruguay Argentina Paraguay in Southern
Montevideo is the capital city of Uruguay, the country whose northern border is Brazil and western border is Argentina.
Their is Brazil, parts of Indonesia, Congo, possibly Chile. Their are probably more, but I don't know what they are. ___________ Brazil, Colombia, Ecuador, Western Sahara, Mauritania...
It is called the Gran Chaco and by some definitions extends into extreme SW Brazil.(The altiplano, a separate geographic area to the NW, is also called the Andean Plateau.)