Well my friend, i don't know about note2 and s3, but i know that they have 4.bones(CPU) each, and i have watch few videos on youtube that i was impressed. but i can't say more sens i don't own them, but i own note the N7000 now, and i can easily upload a videoclip of my note to show you that really hard to catch your eye any lags on it, it's just so smooth that you will not even want to use your laptop ever, as the fixing rooms, kernels modifying and flashing can still be dun on phone without using pc...where sometime a go i hated android, i thought that was crap, and indeed was crap, but there is to much developers and all companies have eye on that os, and really works good, and there is lot of free professional software, otherwise i see as fast and enlarged Symbian OS my android phone, because there is some emotions on GUI that makes me think is like fast Symbian.
The N9 is beautiful device, but the company left MeeGo in darkness, and nothing much we can do about it.