[mathil]

I own a Glo HD as well and I just tried holding both without covers (I use the Libra without one usually, and the Glo with its original black sleepcover) and to be honest the Libra feels much lighter and easier to hold to me. I'm sure it isn't, but I guess the weight being distributed differently really helps with that. It might feel differently if you're holding it with both hands though - I'm referring to one-hand usage right now.
While I was at that I did a lighting comparison. With the light turned off the Glo HD's screen looks whiter than the Libra, and the Libra's grayer (I know it could be the bezel, but I put them one over the other and to be honest it doesn't look like an optical illusion). So when the light is on, the Glo's light looks very white and the Libra, in comparison, is a bit more grayish, especially at lower (<30%) levels. But it doesn't look greenish to me, or any other colour to be honest. It certainly doesn't look like the pictures that you all shared here, or Nate's video (which is egregious). I'm wondering now how common it is.