BTW , Megapixel is not a measurment for quality.
I do not consider this an accurate statement... Megapixels do equal quality, since the more pixels that create a raw file, directly relate to the resolution capabilities of the final image.
However, I think what you were trying to relay, is that
megapixels alone are not the only factor in describing the inherent quality of any single camera or sensor. To answer your question, the C23 has the following advantages over the CGO3+ camera:
1) Greater number of pixels in the final image in photo mode.
2) The same max resolution of video at 4K, but with a max frame rate of 60 FPS... this may not seem to make much of a difference, but it does allow for you to use a 1 f-stop higher setting in shutter speed, when targeting that smooth cinematic formula of 2X the frame rate... which could make the difference in lower light situations.
3) One of the known shortcomings of the CGO series of cameras is a subpar dynamic range of the sensor. The C23 sensor has a far superior dynamic range, which significantly improves both video and photo output.
4) The lens in the C23 is sharper than the CGO series... evidenced by that fact that one year after release, no third party manufacturer has come out with a OEM replacement lens.
5) Specific to photos, the C23 has a classic 35mm 2:3 image ratio... so the proportions between video and photo modes are much more comparable.