Well, if you're using references when drawing or just trying to "copy" what they drew, it will most likely not look exactly the same since every one has their own style, level of drawing, and just talent. All artists draw somewhat differently, so just find a style you're comfortable drawing with. And remember, you're not striving to be an exact replica of a certain artist. Be unique, be you. If you're trying to draw realistically, it will look very different compared to anime (simply because people do not look like that) Traditional and digital art are two different things, but have the same concept. Personally, I prefer drawing traditionally, but drawing digitally opens a lot more options for you. Just keep practicing and improving.