The DBK is sorta like the group Korn: either ya like 'em or ya hate 'em. But even if ya hate 'em ya might end up loving 'em once ya play 'em.
I'm one of the weird ones. I like the DBK better then all the prior Jems because I love chrome, the color black, and skinny necks although I hated it when I first saw it. That 'midnight custard' finish takes getting used to but all it took was for me to play it and I was head over heels in love.
As far as 'look', in my book there's just nothing that looks as hot and ready for shred as the Jem line of guitars. This thing fairly screams "I want to hurt people and I want YOU to help me do it!!!" The DBK specifically is one of the, if not THE, darkest of the Jems. It's evil looking, it's reflective and sucks in light like a sponge at the same time, it just like a guitar you could go into battle with. That last is the truth more then most know. That mate black/shiney glob finish is so easy to care for you won't want to ever have to play a 'nice, flat and shiney' guitar again! Got a ding? Black marker takes care of nearly any damage. Dent? You won't be able to tell between all that enamel conglomeration! Scratch? That must be someone else's guitar! There's nowhere straight enough to get a true scratch!
As far as versatility is concerened, the DBK, just like all the jems, is the most versitile of all the guitars I've ever played. This thing's got playability comming out of it's very pores. Can it play blues? With those Breeds it can! Can it play rock? Wait, you HAVE looked at this thing right? Can it play clean? Does "sweet cream" mean anything to you? Can it thrash? Well, with a trade out of the bridge pickup it will tear your head off!
I personally play an eclectic mix of speed metal, power metal, blues and spacey Pink Floydian type stuff. All I had to do was replace the bridge pickup with a Dimarzio 'Steve's Special' and I was able to cover all that to my liking.
In the end though, it really is a matter of taste. Go arrange to play both and then decide which is right for you.