Exactly. I thought this was already scientifically proven years ago that PDI glass was a whole order of magnitude better than the invisiglass. (not the pinball news story, but somone who brought the glass into their optics lab and tested it there.)

From personal experience again it's PDI that is the hands down, clear cut, no doubt winner. With Invisiglass (and the Stern HD glass) it's kind of like, "hey, there's a lot less reflection, but what is this streaky purple oily reflection on even the slightest fingerprint", and with the PDI glass it's like, "hey, you forgot to install the glass in your machine."