Whether the animal is eaten after death or alive, you chose to eat it. I feel the karma is the same, because, both ways, to satisfy your own curiosity, craving, want and desire, the animal is killed. Of course how heavy your karma depends on carrying completely your intention, motivation, feeling and result. If one takes joy in what they do, with the sole intention of killing and hurting the animals, then I guess the karma is far worse, than if one was forced to eat the animals against their will. Of course both instances would creative negative karma, with the difference on how heavy the negative karma is. I wonder what the resultant karma is for the person... when the karma ripes for him/her to experience the result of their cause, it must be one hell of an unplesant experience!