I want to know the answer to the following question:
Hard rock is differentiated from heavy metal by containing more of an influence of what genre?
All the background I'm provided with is that "While hard rock maintained a bluesy rock and roll identity, including some swing in the back beat and riffs that tended to outline chord progressions in their hooks, heavy metal's riffs often functioned as stand-alone melodies and had no swing in them.". Is that enough to answer the question?