again refer to that review as it talks about the out of the box factory calibration (which was active for the HZ27WC sample) and shows you how it performs against that. there's also a Dell U2711 which tests all the setup in the different presets as well for comparison. remember the Dell is a wide gamut screen and the HZ27WA/C are standard gamut models.
The HZ27WA has an OSD for hardware level changes of RGB etc, whereas the HZ27WC doesn't and only offers a control over the backlight intensity
The HZ27WA has an OSD for hardware level changes of RGB etc, whereas the HZ27WC doesn't and only offers a control over the backlight intensity