Can't give you the stats (I'm pretty sure it's against the forum rules). but I can tell you what your basic marine will be hitting and wounding on ;)
Basic marine goes last in assault, hits on a 5 or 6, wounds on a 6, and then has to get through a 3 plus armour save.
bloodthirster goes first, has 6 attacks on the charge, hits on threes and instant kills on 2's.
You basicly don't want a blood thirster to get into assault- ever, it is more than capable of single handedly killing an entire squad of marines. I'd recomend shooting the crap out of it with lots of assault cannons las cannons and missile launchers if you can spare the fire power. if you do have to get into assault, with it, take lots of thuner hammers and power fists.