The larger picture is much more relaxed and less exaggerated. It is much more focused on the face and features of MC Ride, and isn't being used to draw in or entice consumers in any way. The picture is only of his face and doesn't focus on anything else.
The smaller picture, (from slate magazine) is much more wild and exciting, including his whole body, the stage and microphone, and the crowd in the background. This commercial portrait is used more heavily to get readers to find out more about MC ride and his band, while the fine art portrait does not.