This is mostly a comparison for the screens of the 700/900 and their PDF rendering abilities.
You can check out the pictures, as I think they are mostly self explanatory.
The 900 is VASTLY superior for PDF's. I'm very very happy with the results, as the PDF abilities was the only reason I upgraded from the 700. The annotation is great, as well. They should never have left the 700 with just highlighting and typing, we've got a whole touch screen, use it!
The screen is also much nicer on the 900. Less glare, better contrast. Neither are a match for the K2, but the K2 is no match for the PDF capabilities of the Sony's.
All in all, I'm quite happy. The 700 will be finding a new home soon. If you are interested, let me know
