I think the Warpig has a bit of a scooped EQ, at least a lot of bass. Where it as well is not known as a good lead pickup. And of course its louder, and more brutal!!!
The Nailbomb has, at least mine, lots of mids. It cuts through like a knife and is very clear, though i have not tried the miracle man, but not for long. And its by far the most versatile pickup ive tried. Seriously, it does everything.