I own both, but I find myself reaching for Espresso more. Embark has a little too red of an undertone for my general neutral preferences. (If I am doing a "sunset" eye with oranges or burgandies however, it might work well.)
Generally I like to pair Espresso with Bamboo, Wedge or Cork (and Blanc Type if I want something really light.) These are all matte or satin textures so they do a lovely neutral eye that is VERY subtle.