Originally Posted by JSWolf
Looks like the firmware is not the same. The new cheaper Kindle doesn't have the wasted line at the top of the screen where the previous model has it.
If you are talking about the Title/Status bar at the top of the screen on the K4S, that displays when you first open the book but goes away when you page forward or backward. Subsequent pages will not show it. If it bothers the reader on the first displayed page they can page back then page forward to get rid of it. As far the K4B, it probably doesn't appear in that photo because the reader has already paged back or forward.