16GB of internal memory, expandable memory slot.

- 43 percent lighter than the PSP-3000, making it roughly 108 grams. Nintendo's DSi weighs a comparatively chubby 214g.

- A smaller 3.8" screen (the PSP-3000's is 4.3"). The DSi's is 3.25".

- Bluetooth-capable.

- New games on deck, including Metal Gear Solid, Jak & Daxter, Gran Turismo, and LittleBigPlanet.

- No second analogue nub.

- Available this fall.