-Processor-
Computer: 450 MHz
Pre: 650 MHz
-RAM-
Computer: 64 Meg
Pre: 256 Meg
-Storage-
Computer: 8 GB
Pre: 8 GB
-Volume-
Computer: ~1730 in^3
Pre: ~6 in^3
-GPS-
Computer: No
Pre: Yes
-Bluetooth-
Computer: No
Pre: Just for audio (so far)
-Expandable Storage-
Computer: Yes
Pre: No (Grr)
Thats a pretty fun comparison. The pre will probably be able to play .mp3 files while composing an email without skipping too!