I checked out the Glo (and the Mini) in the Chapters store today. They had them parked side-by-side with a regular KT like the one I've had for more than a year.
The only way I knew it was a Glo was by the extra button on the top. It looked identical. I didn't notice the slightest difference in screen contrast or resolution when I first looked at them side-by-side.
The Glo light seemed even across the screen. I could see the LEDs at the edge if I really looked for them, but overall the lighting was good. It does make the screen look a little whiter when it's on.
BTW, the store display was deserted, and there were no signs up at all saying that there was anything new. No pricing posted.