In addition to the added content, the PSP version of Disgaea 2 will also feature enhancements to the gameplay to make it easier to play on the go. Your characters will be able to move faster than before, and menus will be adjusted to make it easier to find characters, items and magic. A new camera system will also be implemented.
All in all, it looks like PSP fans are in for a treat. Check out the official Japanese site for screenshots.