- The N900 can be overclocked to 1GHz so I hope N9 can do more!
And the N9 have only one processor.
- For the internal memory, i'm OK, but the N9 will have a Micro SD slot?
- For the battery, OK, but you can't change the battery (so, if your N9 bug or if you would change your N9 battery...)
- For RAM, OK, very good!

For me, the N900 have that in more:
- Keyboard :-).
- IR transmitter.
- F.M. transmitter.
...