So, not to derail this, but it may be worth addressing what you mean by "good" and "evil". Different basses will have different tones. Some fit better in certain situations than other. But I will say that I can't say any of my instruments are better or worse for heavy or light music (well, except that one 8-string

).
The MM you have now has a very distinctive tone to it. Yes, it has active electronics to tweak it, but
that humbucking pickup in
that position has a unique signature. Getting into a PJ-style or dual-humbucker style will be inherently different, and will likely be a nice, new tone to have in your arsenal.
But, thinking of one as being for heavy music and one being for not-as-heavy music may be limiting. As an example, my two main 5-strings are a G.Gould (35" scale, graphite neck, with Nordstrand Big Blade pickups) and a Warwick Thumb BO (34" scale, wenge neck, MEC pickups/electronics with piezo bridge). These are two wildly different sounding basses. The G.Gould is defined and tight and can really sizzle when dug into; the Warwick is warm and burpy but can also fry a tweeter with the piezo engaged. I have used both of these basses in severe, heavy music, and they've both spend time in jazz open mics. They sound completely different, but can be at home anywhere.
What I'm saying is that don't worry about which one will be "good" and which one will be "evil". Looking at them that way may be limiting. I'd recommend finding something you like that sounds completely different from the one you already have. After you get to know the differences better you'll be able to figure out which one has a home in which bands.