I am traveling, so stopped in the Chicago Oak Brook location this evening. I cannot see any difference between the 2 available blacks. Is anyone going to spring for the obsidian? If so, what is the difference you see? FWIW, I am hoping that soon Tesla has more than 1 "no charge" color. It seems like they should/could just slightly raise the base price and offer a range of options. If I owned a car company, that's what I'd do!