Robusta coffee beans are known for their bold, earthy flavor and higher caffeine content, which gives them a stronger, more bitter taste compared to the smoother, sweeter profile of Arabica beans. They’re generally easier to grow, more resistant to pests, and thrive at lower altitudes, making them cheaper to produce. Arabica, on the other hand, is more delicate, grows at higher elevations, and offers a wider range of nuanced flavors, which is why it’s often considered higher quality.