The MM will be bassy in a bassy guitar. Lots of treble all the time.
You go up on the high strings and it sings and screams, really smooth and fluid but with a nice pick attack. The lows have the same sort of treble on them (pick attack for thrash :D) and if there are lows for it to pickup they will do so very well.
In an Epi LP I've had a miracle man be pure black-album tone - thick and dark and chewey. Same miracle man in my dean custom (maple neck, alder body) was bright, lush crunch and snappy pick attack.
My Monster MM (DSP, 23k) is like a smoother, darker c-pig. The very high highs and very low lows are tailed off on it a bit (compared to the c-pig; compared to a standard MM its sort of shifted down a bit; lower lows and not as much high extension) and its got a really thick low mid.