Though I think this is still good for a digital piece, I can totally see a huge difference between your traditional pieces and this piece. Except your traditional pieces seem to go closer to realism and this just seems closer to sketch -> line art and then color (cell-shading style). Though this is also a totally different style and going for more of an anime look. Unless you were specifically trying out a style a bit closer to cell-shading, if you're comparing it to your more traditional pieces, it seems as though you are limiting yourself a bit more to stay within the lines than you do with your traditional work which may make the lights and shadows appear a bit flatter? (which you do so well traditionally). You also definitely have more flow and movement in your traditional pieces but I don't really have much I can say on that matter because my pieces also come out looking A LOT stiffer when I sketch digitally than when I do traditionally. If you find out ANY helpful tips on that last one, I would love to know itI wish you good luck! I have no doubt that you're going to be great because judging by your traditional pieces, you're already there