As stated by Agi, the render has a great amount of detail to it, though you played with some settings and it's relatively nice, for the render itself it kind of falls short on the POW affect. I also want to point out that the render has a strong light coming off ( our left) his shoulder that you do not account for. Next time either manip your render to show the lighting you want or the easier way would be to use the light source the render gives you and play with that.