Improved Performance

• The most important distinguishing feature between the 8GB and 16GB iPhone is improved performance. The 16GB iPhone downloads attachments at twice the speed of the 8GB, as well as launches applications at a faster rate.
  
  

New Features

• Features introduced in the 16GB include a video camera with editing capabilities, voice control, and a compass.
  
  

Camera

• The 8GB phone has a 2-megapixel camera. The 16GB has a 3-megapixel camera with autofocus.
  
  

Color

• The 8GB iPhone comes in black. The 16GB version has two color options: black and white.
  
  

Battery Life

• The 8GB and 16GB iPhone have the same amount of talk and stand-by times. The 16GB has more hours of Internet use when accessed through Wi-Fi and more hours of audio/video playback.
  
  

Cost

• With a two-year AT&T wireless service contract, the 8GB iPhone costs $99, while the 16GB iPhone costs $199.