That's like asking us to tell you which is better-- a 1972 Volkswagen Beetle or a 1974 AMC Gremlin.
The Palm device you are asking about was released for sale in the fall of 2005. Six years in cell phone development history is like 30 years for cars. The device may power on, activate on the network and make calls, but email and Internet browsing would be severely limited and good luck getting Facebook or other social sites connected to the device.
"Palm" doesn't exist any more. They went into bankruptcy and were bought out by HP. The Treo line is no longer being made at all and is no longer supported by HP (no tech support, no repair, no apps, no software updates...)
I work on cell phones for a living, and if you brought either of these devices to me for service, I would recommend throwing them out.
