Touch Lux 2 and FBReader quesion

I have a Pocketbook 302 that I dearly love, but after several years of faithful service, it is starting to have some issues. While I have an Android tablet that I also use for reading, I really like reading on an eInk device. So, I've been looking at the Pocketbook Touch Lux 2 as a replacement.

Before jumping through the hoops to order from France, I had couple of questions. Mainly, is the version of FBReader on the Lux as customizable as the version you can install on the 302? Also, how does the screen compare between the two?

Thanks.