I saw both cars today. It seemed really dark in the room where the two cars were and the interior was black/gray, so inside the cars was like looking into an unlit cave. The carpet was definately a light-ish GRAY. The back seats were kind of a light gray/dark gray combo. I loved the feel of the steering wheel. Another big improvement is the big lever up high and in the middle of the backs of the front seats--used to push them forward to get passengers in/out of the back. View out the back stinks like on most new cars--better than Challenger however. The trunk opening looks small in photos and even smaller in person :/ All that being said I love the new interior and outside is just awesome. You really must see the car in person if you haven't yet.
The ZR1, CTS-V and G8 GXP are there to see as well.