Compared to their close relatives, the Rough Collies, how do Scotch Collies often appear regarding mass?

Answer

Appearing lighter and less massive

Scotch Collies are generally described as appearing lighter and less massive when compared directly to Rough Collies. While they share ancestry and overlap in height measurements, the Rough Collie lineage often emphasizes a more imposing presence, sometimes achieved through greater height or a heavier bone structure, especially in show lines. The Scotch Collie retains a frame that reflects its functional requirements, often looking leaner than the robust frame typical of many Rough Collies.

Compared to their close relatives, the Rough Collies, how do Scotch Collies often appear regarding mass?
sizeDogbreedScotch Collie