Re: Question to the Androiders
Well, JDX, I can't see anything exciting that it feels like my S3 is missing. It's fast, has a gigantic screen, nice nippy GPU and I get a couple of days on a charge (using on-board power management options only). Google maps offline mode runs really nicely, the camera works (it's a bit underwhelming, but then, I usually carry a camera, so eh).
I suspect that if I did have an iPhone 5, I would run roughly the same things on them anyway (barring having a decent choice of browsers), so it's not really a huge issue either way. I suspect that I am happier with the S3, with the SD slot, get a surprising amount of use out of the oddly good FM tuner.
It'll probably be a month or so before it gets its Android 4.1 ("Jellybean") update, which will make a good device even nicer.
I'm sorry, maybe you were looking for more meat here. I'm sure either are perfectly viable devices, I would use either, I would root either. I'd probably miss Firefox and Adblock Plus on the iPhone, I suppose.
We don't know how fast the CPU etc. in the iPhone 5 is yet for sure, but I am sure that performance will be broadly compatible with fairly high-end Android devices (that's sure to cause angry rants from both sets of insecure platform weenies).
(As regards the S2, my brother has one, it's perfectly nice, but the S3 is faster, feels thinner, has a vastly superior GPU. Anyone with a S2 in good condition would probably be good for a few years though, it doesn't suck)