JP, it's kinda difficult to explain.
I find it easier to use band/tone analagies as many will understand then.
Think of Hetfield CHUG with Custom Warpig, then Glenn Tipton GRIND with PAINKILLER.
BOTH are HUGE sounding pups but the Painkiller is just more New Wave Of British Heavy Metal to me (with modern tilt) whereas Custom Warpig is more Tight Thrash, no slop here, just modern HARDCORE. Many 'new' bands could use Custom 'Pig (in sound), Stone Sour, Godsmack. Kinda downtuned without downtuning if that makes sense.
Nick
hopefully clips will help :)