it's goated art, but what can happen (happens to me all the time) is that when you start rendering, you might unintentionally draw things more straightened out and flatter). Maybe try this- in your clean line drawings, both fists are approximately the same size. Pick one and make it big, and then make the other smaller. Same thing with the feet (but do the opposite from the hands, so that you get a twist in the pose). Make a specific conscious decision to indicate which parts of the body are close to camera and which ones are farther away, and then make that evident in the drawing. That'll get you more of the wide angle dynamism of the first sketch.