Graviteam has 3 times the number of programmers BFC does. Just sayin'
I actually think CM has fairly good graphics for it's genre, good enough I still put the camera down to level 1 to watch my PBEM turns like a movie. Vein's effects mod helps a lot
It's performance does not scale with computing power, which is the source of much criticism. The flip side of that coin is that it runs reasonably well on very old hardware.