Specs

• The Shadow is 2.1 inches wide, 4.1 inches long, .6 inches thick and weighs 5.3 oz. The Blackberry Pearl is 1.97 inches wide, 4.2 inches long, .57 inches thick and weighs 3.1 oz.
  
  

Carriers

• In the United States, the Shadow is a T-Mobile-exclusive smart phone, and the Blackberry Pearl 8100 is available through T-Mobile, AT&T and Cellular One, among other carriers.
  
  

Camera

• The Shadow has a 2-megapixel camera that can shoot videos as well as still photos. The Blackberry Pearl 8100 has a 1.3-megapixel camera that does not have video capabilities---although later models of the Pearl can shoot video.
  
  

Battery Life

• Both the Blackberry Pearl 8100 and the Shadow have a rechargeable battery. The Pearl's battery has 3.5 hours of talk time between charges, and the Shadow has 7 hours of talk time per charge.
  
  

Memory

• Both the Blackberry Pearl 8100 and the Shadow support microSD memory cards, which allow you to store photos, videos and music without using all of the phone's internal memory.