I respectfully dissagree with EC. I think this has the most life out of any of them and looks the most real.
I'm being picky, but, specifically, his right eye in the last picture. It could be just the shadows or that it's a little out of focus, but the whites of his eyes and blacks of his pupils aren't as distinct and even as they could be. I think it makes him look a bit less life like. But I know these pictures are much larger than the actual heads so I'm sure it will look great in hand.