Nano watch vs. Fossil Wrist PDA

I unearthed my 2004 Fossil Wrist PDA, tucked away in a gadget drawer, to compare with the Nano watch of 2011. The Fossil watch has 4MB of memory and uses a stylus tucked in the buckle to control the Palm OS touch screen; the Nano has finger-based multitouch and no PDA functions, but 8GB to 16GB of memory. They're spiritual cousins.