The part that threw me off was where you said that the Canon sensor contains 3 photosites per pixel -- which based on this pots leads me to believe that you mea

The part that threw me off was where you said that the Canon sensor contains 3 photosites per pixel -- which based on this pots leads me to believe that you meant that it uses 3 photo sites to record each pixel, which is still not entirely accurate; the Rover's capture every color at every photosite, so they use all of their sensor's resolution. Canon (and everyone else but Foveon, for that matter) making a single-shot sensor can't do that, they instead sacrifice the real resolution of the sensor due to the Bayer filter, and use interpolation to make up the difference.