I think it doesn't have so much to do with the color space, but with tone mapping or camera profiles. The same RAW file will give different colors in different RAW developing applications for this reason (because they use different camera profiles).
Regarding the worse sharpness of image B: it's because of the CA of the lens -- different colors get different magnification and this reduces sharpness, but this can be corrected in software quite effectively by scaling the different color channels. The NX1 does this in-camera very effectively, as you can see in image A.
BenjaminJ got a reaction from John Wendell in Samsung NX1 - which is 4K video and which is the 28MP raw still? Can you tell?