How is a Rob Roy different from a Manhattan?

A Rob Roy is fundamentally different from a Manhattan in that it specifically uses Scotch whisky as its base spirit instead of the generally used bourbon or rye whiskey in a Manhattan. This distinction in base spirit significantly alters the flavor profile of the drink. Scotch, coming from Scotland and often characterized by its smoky, peaty notes, provides a unique twist to the classic Manhattan flavors, which are typically richer and sweeter due to the use of bourbon or rye. This variation is essential for understanding the nuances between these two cocktails, as the base spirit plays a critical role in shaping the overall taste and character of the drink.

Other elements of the drinks, such as garnishes or serving methods, do not change the fundamental nature of these cocktails as profoundly as the difference in the base spirit does. The Rob Roy can be garnished similarly to a Manhattan, often with a cherry or a twist, and both drinks can be served straight up or on the rocks. Thus, the most pivotal difference is firmly rooted in the type of whisky used.