The first one (top) is the Boeye OEM E900 eReader, and the second one (right) is the Kindle DX.
What you can't see is that their internal specs are identical also, including the 3G hardware (but not the service behind the connection!).
We're short on details of built-in firmware functionality, any associated software and content sources and stores.....maybe that's up to an OEM to provide.
If you buy 100 of them, you can get them for $311.
Watch out for OEM versions of this design to hit retail some day...