I reckon "metal specific bass" is sales malarkey..
In no particular order.. Amp, Fx, Tuning, and "how you play it" would all be more relevant I'd say.
On the odd occasions when I've been recruited into doing metal-y type stuff ( purely as a hireling ) I've used a. a Rickenbacker 4001.. and b. a Hohner Jack headless, in the case of the latter tuned down to a kind of drop C.
Both of those functioned perfectly adequately for the purpose.