As for my opinion on the digital piece; There's something about the placement of the horse and the moon. Look at the negative shape formed by the space around the horse'se belly and legs, and the moon. It is complicated and mirrors the shape of the horse so much , and is so bright that at first glance I have trouble sepereating it from the horse itself. Perhaps, if you moved the moon to the right a little? Or, you could make the shadows of the trees radiate back toward the viewer, as the would with the light source in that location. Or, give the trees a "silver lining" as the moon would brighten one edge ofthem.
Just ideas. I don't do digital art so I have no idea if I am saying to do somethign easy or hard.
the pencil drawing is stunning! Very well done!