Since you've used both designs, why would you prefer capacitative? As I understand it, the pros are that it allows multitouch, and it doesn't require any pressure to use, whereas the cons are that you lose precision and the ability to use the screen with anything other than a bare fingertip (so no nails, no stylus). On the face of it that doesn't sound like a good trade-off, particularly on a device like the N900 which will likely run quite a lot of apps (desktop ports and web apps) not designed specifically for a fingers only interface.

Clearly, on something like the iPhone that lacks a separate keyboard the multitouch is useful for things like game controls (though at the cost of having the user's thumbs obscure the display), but I what would capacitative add to the N900?