A primary coffee taste sensation created as salts in the coffee combine with sugars to increase the overall sweetness. Characteristic found most often in washed arabica coffees grown at elevations below 4,000 feet, such Kona coffee from Hawaii. Mellow ranges from mild to delicate.
flavor is smooth, rich, full, soft, or melodious; usually a pleasant, fully developed flavor reached after an adequate aging period. In this sense of matured, softened, developed flavor, is often used when writing about cheese or wine. But it could be used perfectly for preserved or canned food, or to describe a particularly rich dish. Mellow is opposite to harsh.