These are the best I have for now. The first two are Granite and the last is Maximum Steel. They were all taken with my iPhone 5S in the same showroom within minutes of each other. The pictures show the shade of grey pretty well, but don't show the hue or vast amount of metal flake in both paints at all.
Maximum Steel is definitely darker (looks almost black at night) and has a blue-ish hue, while Granite is pretty much grey all of the time (occasionally, in VERY bright sunlight, it has a subtle brown hue). I'll try to get some better pictures for you next weekend.
Also, I have a TON of pictures of my Granite Overland in my thread (link is in my signature) in various lighting conditions. I also might be buying an SRT soon, either in DCR, Redline, Granite, or Maximum Steel, and will post a lot of pictures of it if I get one.
Edit: Here is a link to some pretty decent pictures: