Pietro just asked how reading
http://www.pnas.org/content/108/49/19569.full.pdf works.
The pdf works quite fine on both devices. m92 has a bit better contrast (903 still good readable though). For reading a longer two or three column text the 903 might be better, but then other people might be quite happy with using the stylus for panning around.
Video:
http://youtu.be/PH0T2cFjJXc (less then 5 mins, hurray!)