Whether you should get N9 or iPhone is totally your decision. I switched to 4S, because N9 is unpolished product with many issues which are not well thought, implemented or completed.
This is a very brief overview:
* Display: N9 display is good, but not as good as iPhone;
* UI:
- N9's swipe is enjoyable (if you have hand big enough for yout thumb to travel to top of the phone. Mine is big but not sufficient to easily handle vertical swipes). iPhone has home button. Both phones allow one hand operation.
- On N9 you can not create folders: so every app that you download, even every webpage that you make favourite will end up on your homescreen. Messy and not comfortable (I have 79 apps/ webpages)
* Applications: No comparison: visit Ovi Store and Apps Store and you will feel yourself frustration of having powerful multitasking phone with a limited apps. Unfortunately, since Nokia does not see future for MeeGo, number of apps will remain limited
* PC Sync issues: iTunes might not be great, but it works and syncs whatever is needed. With N9 you only have limited sync (media files) via Nokia Link and have to be really creative to sync contacts and calendars. Even if you are it does not work perfectly in all cases.
* Office applications: No apps to edit office documents in N9.
* Emails: N9 email was a big frustration:
- you can not copy & paste text;
- if you reply/ forward email you can not make comments in the body of text on which you are replying;
- you cannot copy email addresses
* Front facing camera: There is one in N9 for which Nokia charges you when selling phone. Unfortunately you find out later that there is no chance that you can make video calls.
* Camera: Despite having 8mp Carl Zeiss lens -- photo quality is not that good as it sounds. I guess we still need to thanj Nokia for camera that works. iPhone photos are much better.
* Battery: fine on both phones.
* Receiption: fine on both phones.
* Loudspeaker: N9 is not adequate by any means. iPhone is not the best but much better.
* Internet: Browser on N9 does not reflow text: so you have to scroll to the left and right to read the text, unless you have an eagle eye and can read very small fonts. No such issue on iPhone which perfectly fits pages.
* Siri: It is future. Wonder if Nokia was thinking of anything like this? It makes iPhone steps ahead of its competitors.
* Swype keyboard: Very good (not excellent, since with a "swipe phone" it is difficult to swipe away "swipe keyboard" in order to select another keyboard). Unfortunately this is not unique to Nokia.
I will write more as soon as I discover new issues
... Did you compare displays in a bright light, like in outside - you should 