Depends on the guitar. What woods does it have? What scale length? How does it sound acoustically?
I love the Holydiver, it's more than tight enough for metal, role the volume pot down and you can do blues and classic rock, it has a great lead tone, but it's picky. I hated it in my Strat, which is a very midrange heavy guitar. Sounds lovely in my Jackson which has a Mahogany Body, a Maple Neck and a Rosewood Fretboard.
No experience with the Supermassive. Someone else might chime in.
Cheers