I don't know why, the symbol is not there.
It's true, maybe the black one could use some highlights, to make it shine a bit more.
And I think the combat armor design is mostly round shaped, and smooth, like one of those beautiful old cars. The one from New Vegas is different, so maybe the model would have to be different, or, the texture has to fit a bit more into it. I think that erasing those straight lines and dots from the armor would look better.