Every time I have had to restart my device it is only because I was doing something the iPhone could never dream of! Take for example earlier today when I was running FoxFi (free wireless tethering, try that on an iPhone) while I was updating 12 different apps (which causes Avast to fire up in the background scanning) and streaming Pandora!
iPhones can't do free wireless tethering? Someone should have told me that when I was doing it on my iPhone 4S, that what I was doing was impossible! (jailbreaking opens up options, just like rooting.)
And this bring to light a huge issue I've had with the whole Android vs. iOS thing: ill-informed, biased opinions masquerading as fact. On both sides, but I have seen it on the Android side far more in recent time.
I am an ex-iPhone 4S user who recently switched to the Galaxy S3, and this question (which is better) really does come down to personal preference and use. However, there are things to consider, and here's a little list I've put together from my time with both (admittedly, my Galaxy S3 time is short):
-iOS works better out of the box in my experience. The first full day I used my S3, my battery drained from 100% to 9% in about 10 hours. I was at work and had only picked it up periodically. I found out that the phone defaults to tons of settings which put the phone in constant awareness mode, syncing and updating things all day, draining your battery dry. I had to tweak about 4-5 settings, and now it's fine, but for a normal user, this is an issue, in my opinion.
-iPhones work better for one-handers. I am a one-hander, and my hands are pretty big (I'm 6'4"), so the S3 took a bit to get used to without using two hands. I've got it well now, but I still feel like I might drop it using it with one hand sometimes, from awkward finger movements.
-Android is way more customizable, and it's fun to mess with the screens and widgets to find a layout that works for you. Whether or not this is actually more functional or productive is doubtful to me, however, it's really just cosmetic. We're talking about fractions of seconds between seeing something on the screen and having to press an icon to see it. You definitely get a far greater sense of personalization with Android, however.
-The screen on the S3 is really nice and the extra size is something you get used to really quickly. Going back to an iPhone 4S makes it look so cramped. However, the colors on the iPhone are truer in my opinion; the galaxy oversaturates, particularly yellows and yellow-greens.
-I've played with the iPhone 5, and its just as fast as the S3 in my opinion. It's actually faster in some cases, namely when switching apps, and connecting to data networks. My S3 can be zippy, but things like Maps slow it down to a crawl until it reserves it's resources completely, sometimes a couple minutes into using the app. I haven't had that problem in any Maps on an iPhone before, not to that extent.
-Depending on your preference, microUSB could be a positive or negative for the S3. It's definitely more ubiquitous, but I personally think Apple made the right decision with improving the connector. MicroUSB can only exchange data and charge, while the Lightning port can control the device like the previous one, plus it's more efficient at providing a charge. It's simply better than microUSB in my opinion, and had to change at some point; the gripes about it are completely misguided.
-If you use iTunes, the iPhone is definitely a better choice to sync with it, especially with the use of iTunes match (flawed but functional). However, I was not really a part of Apple's ecosystem, having only purchased a few music albums from iTunes, and so the switch was not difficult. This comes down to whether you have a stake in Apple's ecosystem. I recently uploaded my iTunes library to Google Music, and it workds great as well. This is preference.
-App selection. The Google Play store is simply not as robust as the iTunes store, and high-quality, high-production-value apps are more likely to be on the Apple app store than Google Play. This depends on what apps you typically use the most, many work for both systems, but there will be some that you can't find from one or the other. In my experience, the Apple app store had more high-quality exclusives.
-Speaking of the Maps experience I previously mentioned, Apple Maps is definitely struggling, so the Google Maps app is a superior option, and the Google navigation (when it finally loads) is really brilliant and completely replaces the need for a GPS. Apple Maps will get better, but Google Maps is way ahead.
-Minor Gripe: the S3 did not have group messages by default! I had to download a replacement text messaging app to get it, which works great, but I've never had to use a third party texting app with an iPhone before.
-Minor Gripe: Samsung voice control offering is not good. It's slow and doesn't work very well for me. That being said, Siri is nothing special either.
-Minor Gripe: the iPhone 5 doesn't have the native toggle switch bar that Android does, which has really come in handy for me when trying to quickly turn off/on wifi, gps, bluetooth, etc.
Hope this helps a bit, the experience from a non-fanboy recent switcher.
if we'r talkin about phones and not o/s, the s3 is the most stable phone (not just smartphone) ive ever owned i think.... maybe equal with the Nokia 3210 
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