I also tried the note II for a couple of days, and I think it had better performance and screen then the SG3 did, that being said the Note II was just too darn large for me. If you install a case on the Note II even with my big hands, it makes it impossible to text and send email which is my primary function of my phones.
I like the bump in screen from 3.5 to 4" but they should have gone to 4.3 or 4.5 that would be perfect. The SGIII in Europe has Quad Core, so I am not sure why the US version has Dual Core, but if that phone had a Quad in it, I would switch back.
The one thing I do not like about Android is the view of the calendar, it could be that I am just spoiled as to how iOS is, but hopefully it gets improved and the iPhone gets a slightly larger display, but if the iPhone does not and doesn't get a whole lot of refinements by the iPhone 6 I may force myself to switch, iOS is just to boring. Granted Apple gives us slight improvements over time, but I mean they are not earth shattering refinements.
I am hoping Apple gets off their high horse about not doing certain things like when Steve was running things, but we will see, I think Tim is a good leader and Johnny seems to have a few tricks up his sleeve.