Size

• The TomTom Go and the Go 720 are close in width and height. However, the TomTom Go 720 is under half the depth of the Go Classic and also weighs several ounces less. Despite being generally smaller, the TomTom Go 720 has a larger screen.
  
  

Hardware

• The TomTom GO 720 has twice the processing power and twice the memory of the TomTom GO. Both devices have a transflective LCD screen; however the TomTom Go 720 has slightly higher resolution.
  
  

Extra Features

• The TomTom GO 720 is equipped with several features that are not available on the original TomTom GO. These include Bluetooth technology, hands-free calling and music playing capabilities.