The armor was super simple to do, I used a thicker brush for the outline, and a thinner brush for details. As for coloring, I used a single fill color with a clipping mask over that for the shadows and highlights. It looks like you did basically the same thing, the main difference that stands out to me is the technique you used for the highlights; you have more gradations/varieties of color to yours, which might look a bit more "natural," but it doesn't give it the same level of *pop* as if you were to just use a single bold color. The other difference is between the sharpness of the lines - with a brush the result is more organic and you just don't get the sharp corners that you can achieve while using the pen tool (which lend themselves well to more mechanical things such as armor). I also think matching Octavia's crest color to her distinguishable neck bow helps tie the costume together and make it more cohesive.