I recently debated this myself - and decided on the T3 because it has more memory. And I like that there are more programs already on a memory card for the T3. I think it will depend on what you want out of your PDA.
Looking to get a new palm based handheld and narrowed it down to these two. I like the stretch screen and the speed of the T3, but it doesnt have the camera and Wifi especially like the clie. the clie doesnt have the speed as the T3. Not sure which to get. Help!