Man I want what you are smoking!
If a spec sheet means nothing, then you are ordered to send me your phone, you do not qualify for technology. I will exchange it for my Nokia 1616 just to make you happy.

And still you say specs mean nothing and then you say "I wish my N900 had more RAM".... hypocrite much?

And your "new" analogy is worse than the first, just re-read it (cmon man pass me what your smoking).

Anyways I'm not here to feed or cause flame-war, I want to help answer your questions.
+Browsing= The SGSII those this much better than the N9. When it comes to speed, rendering and quality of flash support.

+Video Playing= The N9's player is much better than Samsung's but there are alternate ones in the Market which are just as good as N9's. It can playback 1080p@30fps no problem from my experience, but the N9 only handles 720p. The SGSII looks so much better than N9 (picture quality) and the Note will only be a leap better.

+Multitasking= Android's current implementation is that the last four/five (compatible) apps run in the background. If it gets too intensive it pauses the apps. I find myself loading a webpage, then shifting to the calculator, doing a few calculations, going back to the browser to see it fully loaded but it doesn't work for flash content or the youtube app. N9's implementation in imba

+IM handling= I dont do any IM, but Facebooks works flawless. I didn't try this on the N9.

+Ease of use= Very debatable. There's somethings I like from the N9 but after putting custom roms and highly tweekable apps, I prefer Google's way.

+Typing speed= I would say the N9 felt faster and more comfortable but that might be a placebo effect. The SGSII is pretty good. Swype and SwiftKeyX make them very decent. I see this getting only better with a higher resolution display and larger touchscreen on the SGNote.

+Music= Both suck. But with root you can tweek the eq of the SGSII which makes the sound quality better on headsets. I don't think this will (unofficially) make to the N9.
I actually like the stock video player on the Samsung the controls are nicely laid out, the N9 feels "alien". But there might be some Qt Apps for the N9 for a better player, who knows?

+Mail= SGSII is decent, never had any issues. The Note is introducing swipable interface for the mail in landscape mode so you see the folders on the left, the list in the middle, and the mail on the right. I haven't tried it on the N9.

So basically the SGSII is a great smartphone. The SGNote brings all of the good stuff and makes it better (like resolution, screen, pen, better software etc), it is going to be a powerhouse of a phone. The N9 has several advantages, and I'm not denying them, but they're too little and most of its advantages are cancelled out because of Android's large volume of applications and support.

The Verdict: Samsung Galaxy Note is not for everybody, but those who appreciate its lineage wont be disappointed, the same cannot be said about the Nokia N9.