I contacted Pocketbook and they confirmed that there are two separate devices, as detailed in the promotional video here
https://www.youtube.com/watch?v=QPHslmRrMEw and on the non-US versions of the website (I wanted to confirm this because several online sources seem to be under the assumption that the CAD Reader Flex was substituting the prior model).
I also confirmed that the version of Android they're preinstalling will permit access to the Google Play Store.