I think a distinction between these two has to be looked at in backwards-time mode, if we're not talking about copy cats but innovators and originals.... If they're any food thry transcend either genre's then-existing limits... boundaries... characteristics... "rules."

Plus, although one can look back and trace influences, the influences on good musicians are usually so eclectic--

And to really categorize any artist is primarily for the convenience of the companies marketing them.

For the fans, as long as it's good music, it's all just "music."

~Susan