with regards to that style and density.

there is no reason why lace or skin will be better than the other, even in the context of showing top scalp appearance, you can choose which one you like based on the pros and cons of each base material.

in short: since your not exposing a front hairline, choose any base material you want, it will make no difference to the outcome of the look of the piece.

it's a bit of a mute question given the hairstyle.