Here’s a demonstration of the Nokia Lumia 920 vs iPhone 5 camera. The Nokia Lumia 920 with Pureview technology has optical image stabilization also known as floating lens technology. The video on the Nokia Lumia 920 has less blurring and less shake compared to the iPhone 5.
This is an extreme example. In normal conditions, the Nokia Lumia 920 will record videos that are smoother while moving or panning compared to the Apple iPhone 5.