There was a picture of some bullets fired though a thin sheet of metal a while back. I can't remember if it was here or on accurate reloading, but the MRX hole was bigger than the TSX hole.

I don't know how much this relates to actual performance on big game animals, since the resistance of the metal would amplify the effect immediately, but it is interesting. I was thinking maybe on a broadside shot it might not act that much differently than a TSX, but if it hits bone the rear tungsten core might bulge and create a big mushroom.