I used s2 since day one of launch and thus, this is what I feel.
1. Auto restarts
- check your app. Any not legit one?
- Check your kernel and rom as well
2. Battery die fast
- mine last for about 10 hours with moderate to heavy usage.
- control your app and you will be just fine
3. Overheat
- 51c is pretty normal but again, depending on how many apps you are running back ground
- on normal basis, 30-50 is normal
4. Wifi hardware fried
- wow no idea mate...
Note 2 is very good and improved a lot from s2. Of course, you can't compare i5 and GN2 as they are using different OS.
Ask yourself, what is that you want. Don't ever ask us what is better because we might love GN2, but you dont and vice versa. It is your money and thus, play with both phone and choose which suits you best.
There is no a better phone. It is just on self preference.
+1. NO phone is better than the other. A phone is better when it suit your preference.
A very noticeable different on battery life (of course battery cap. increase). on d heat, yes, sgs 2 can get very hot easily on gaming.