Hope you don't mind I reply in English. I traded my S2 with Note 3 months ago and no regret. It's not only about the size (4.3" vs 5.3"), it's also the 720p resolution with the note to help you see more in a page.
Although Note is a bit lag compare to S2 (but Note is still fast), Note's battery life is MUCH better than S2.
My SE X1 rom-> http://forum.xda-developers.com/forumdisplay.php?f=471