You can tell it's 'better' generally from the specs really
dual core cpu, cameras (eventhough they do sort of suck), thinner, long battery life, etc.
I've heard some rumours about it overheating, which would make sense, since it has twice the CPU in a 33% smaller space, but they'e just rumours, quite isolated incidents i would say.
Dont have one, but i'd definately get one. Perhaps soon.