There are two major types of coffee beans, Arabica and Robusta, with arabica considered to be much better quality. Arabica beans are naturally higher in sugar than the Robusta bean varieties, which gives them a better flavor profile and aroma as well as keeps them less bitter. Additionally, Arabica plants are self-pollinating. This leads to fewer mutations and a more consistent taste.  Arabica beans also contain higher levels of the good-for-you compounds found in coffee—antioxidants and minerals like magnesium, potassium, and niacin. Additionally, these beans have less caffeine than other varieties. But the bottom line is that Arabica beans just taste better.