If you are a coffee person, you would never be tired of trying coffee varieties from all over the world. The coffee varieties that come from the heart of Hawaii are unique in many ways. For example, the best Hawaiian coffee varieties like Kona are restricted to a certain geographic limit. So if you have never tried tasting it, then it's time to understand this coffee better. Medium vs. Dark Roast The best Kona coffee comes in two varieties –first one is medium roast and second one is dark roast. Each variety has its share of a connoisseur. The basic difference between them is that the dark variety is roasted for a longer time than that of medium roast. The extended time for roasting makes dark Kona coffee develop a bold flavor. It is also less acidic content. In the case of dark roasted coffee, the process of roasting standardize with the aroma. However, medium roast coffee is often a favorite among most American consumers. Which One Is Healthier? As a specific study of the Jo