Everything is bad. The hair. The beards. The animations.
How did anyone at Blizzard think that these look even remotely similar? Look at that hairline! Also the posture is completely different; while the cropping isn't exactly the same, these pictures were taken without moving the camera at all, so the angles are the exact same. You can see how much he's shifted by the head's position relative to background objects.
edit: relevant The Grind