I agree stabbing is more effective with pointy knife but blade like dundees, you can use both ways, thats the point.. and yes i dont have personal experience so i dont know what happens when you slit someones throat.. And bout slashing veins, if you manage to slit example his leg what has big veins its game over after little time. So they are both deadly.
There was this guy who accidently very little touched his leg with chainsaw died almost instant because of fast blood loss.