Are Brazil and Colombia the most commonly mentioned coffee-producing countries? The actual ranking of green bean production by country is Brazil in first place, Vietnam in second, Indonesia in third, and Colombia in third.
Brazil certainly has the image of producing the most coffee beans.
However, Colombia also has a presence, with coffees like Georgia's Emerald Mountain and Inoda Coffee's Colombian Emerald.
Perhaps these are the top two in South America?
While Brazilian coffee has a milder acidity, Colombian coffee is said to be characterized by a fruity acidity.