I had a sit in a Jerez Black M3 today, it looks very similar to Carbon Black. The only difference is likely to be in certain lights when a greeny/blue hue shows through. It's a good colour in exactly the same way that Carbon Black was.
I also had the chance to examine the Fox Red leather first hand, and it's not Red. Think Cinamon as we used to have on the E46 M3, but very slightly darker. It's also good and would best suit a contrasting exterior colour such as Jerez Black, or even Interlagos Blue.