The defining characteristic separating two popular American whiskeys centers on the grain composition used in their production. One must have a mash bill consisting of at least 51% rye, while the other requires at least 51% corn. This single difference profoundly impacts the flavor profile, resulting in distinct sensory experiences for the consumer.
Understanding this fundamental distinction is crucial for appreciating the nuances within the whiskey world. The presence and percentage of the dominant grain influence not only the immediate taste but also the complexity, finish, and overall character of the spirit. History and legal regulations further contribute to the unique identity of each type.