From what I've read/heard:
- The larger screen sounds nicer, but the display can look more pixelated. Same resolution as Jornada but double screen estate.
- The keys are larger, but don't feel as good and snappy as the Jornada's.
- Battery life is shorter, probably due to the hungry big screen.
- A bit too bulky to my taste
- Look more plastic and not as stylish
But maybe these are just biases. I don't have one anyway.