You're confusing the Treo 800W with the Treo Pro. While both are Treos and both run Windows Mobile, the Pro is a much newer design with a non-recessed screen, 3G, Wifi, and GPS support. The Treo 800W is an older looking design, sort of a Centro on steroids, that is a replacement for the venerable 700W.
Specs for the Treo Pro can be found here:
Treo Pro Specifications - Treonauts