ipad is tab..
phone and tab different..

now, your s3, do you know the meaning of multitask?
not you multitask, phone multitask.
you call on your s3 while browsing? or while you browse, someone called, screen changed?
your s3 has the ability to play youtube while browsing different site?

Is not that we need quad core. We need performance. I can't talk for all quad core phones coz I don't have them. But I talk for s3. Does it deliver? Comparing with my ipad performance is a little better on my iPad although I am nit picking. there are things that is noticeably slow on S3. Opening Skype is about 5 seconds slower on s3.and browsing on chrome can notice frame rate drop a little. And sometimes s3 returning to menu it takes a few seconds pause before it displays especially after a heavy app. But after all that I still prefer the overall experience on S3 coz it get things done. And the multitasking works better on s3. So quad core all dual core doesn't mean anything to me. It's the overall experience.

fyi for those who haven't yet experienced JB yet, quad core is not a necessity anymore

anybody can compare s3 and s2 performance? is it vastly different?
must be the same OS (ICS) and everything else the same (stock OS).
and it must be practical usage like opening apps, returning to home, opening multitask panel, etc.