The only device I've physically held is my PRS 650 so I'm not sure, but I did extensive research online and viewed plenty of vids, I always got the feeling that the keypad on the kindle or the nav-screen on the nook actually made the screen look smaller. I mean less screenspace per devicespace right? If I want a reader, I don't want to carry around an unneccsary inch. :P That said, I find the 650 size to be perfect and wouldnt have it any other way.
