After using an iPhone for years, I've figured out what I want and need a smartphone to do.
That is to say, my app usage is very different on my smartphone vs. my tablet. Some crossover -- like syncing bookmarks -- is great but for the most part I use these devices in very different ways.
I've discovered that making calls is, for me, not the activity I do most on my smartphone; in fact, it ranks like #4 in activities I spend the most time doing on a mobile device. I access the web the most and want my web-accessing experience to be the best I can make it.
So, for me, the top reason to get the Galaxy Note 2 is the screen size. I want a phablet, I want a big old window looking onto the internet and my data. I also want to keep it in my pocket, something I can't do with my iPad.
There are Android versions of most all the apps I use on my iPhone. For certain ones, there are easily-instituted alternates. I point this out because it's not the Android OS so much that I find appealing (even though it is very nice and I love its very customizable options, something I didn't get much of from iOS).
When the Note 2 hits AT&T here in the U.S., I'm jumping on board and buying this bad-boy as my communications device. My iPhone 4 and its tiny 3.5 screen will become a wifi-tethered music player I keep in my car.
Sorry for the rambling reply -- I just want to be sure I'm making sense.