• A portable GPS personal navigation device, shown with an optional suction cup attachment.Ryan McVay/Photodisc/Getty Images
  
  The Garmin Nuvi 205W and 255W are both affordable and easy-to-use entry-level portable GPS units featuring 4.8-inch view screens, which are larger than standard. Although their shape and size are identical, knowing the differences between the 205W and the 255W will help you determine which model is right for you.
  
  

Price

• Generally speaking, as is the case for Garmin Nuvi products, a higher model number indicates a higher price and, accordingly, more features. You can expect the Nuvi 205 to run about $30 to $40 less than the 255W.
  
  

Navigation

• The biggest difference between the two models in terms of everyday use is the voice prompts for turn-by-turn directions found on the 255W model. A voice prompt feature means the unit will announce upcoming turns audibly, allowing you keep your eyes on the road and spend less time looking at the device.
  
  

Additional Features

• In addition to having audible voice prompts, the 255W unit has Garmin's EcoRoute feature, a navigation option to suggest a "less fuel" route and provide a mileage report, and Garmin Garage, a free online service providing customization options for voices and vehicles. The 255W, unlike the 205W, also has a currency converter and a measurement converter.
  
  

Recall Information

• Garmin recalled some of its Nuvi GPS devices for battery replacement. However, neither of these units was included in the recall.