Japanese "Bargain" Editions

Kaji Motomiya

So I was on YesAsia, looking for some import PSP games, when I find that some listings are put in twice. One is the original version at a standard US price, and the other is a cheaper price called the "Bargain Edition." The case for the Bargain Edition is gray with the main picture shrunk down in the middle a bit.

Game wise, what's the difference between the original and the bargain edition, if any? Also for package wise?