I kind of thought those two terms were synonymous, or I hear people using them synomomously, but is there a "defined" deference that is easily explained?
The first google result says this but it doesn't seem to jive well:
1Heavy metal is much simpler but much louder than hard rock. This genre of music was greatly influenced by classical music. ... 2When it comes to musical tempo, heavy metal is faster than rock. 3Hard rock leans more to being sexy and slow, much like the rock n roll of the 60s.
1,2,3 Doesn't make much sense??