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					Originally Posted by Barty  I just read the PW4 uses a plastic-backed screen rather than glass. Maybe that's the difference. I wonder if it's been shown to be less prone to breakage. | 
	
 AFAIR, the only two ereaders less than 10.3" diagonal with a Mobius screen (eInk plastic substrate) are the Kobo Forma and Tolino Epos 2 8" devices.
I think the PW4 uses a plastic front layer instead of glass. Sadly the substrate is the layer that usually has issues with cracking or breaking.