These come from raw files, opened with Adobe Camera Raw, with the noise reduction completely removed. (I'm not quite sure whether that means no NR has taken place, however.) What's striking is how similar the noise looks; most of the difference in appearance I attribute to the Nikon's superior automatic white balance.
The exposure and metering in the 60D are excellent. This was shot in extremely low light with only the Speedlite 580EX for illumination. Black cats are very hard to expose properly even under optimal conditions. I adjusted the white balance on this shot, because I accidentally shot it with the wrong custom setting.
As with its other dSLRs, Canon doesn't reveal the baseline settings for the neutral and faithful color styles, so it's kind of difficult to tweak them with confidence. Because the colors looked so flat (and not particularly accurate) with those settings, I ended up doing what I hate--using the Landscape setting. It produced these very pleasing, saturated colors. But the true colors lie somewhere between the neutral and landscape options.