I’ve finished the story in Final Fantasy XIII. Still a ton left to do, like collect all the trophies, get the super-ultimate weapons, and what-not. (Although I’m not entirely sure how much I’m actually going to do.)
Based on what I've currently figured out, every item has a "multiplier" that they apply to items to determine how much XP they offer. Therefore, XP values between items are consistent between each individual item, so something that provides more XP to one item will provide more XP to another item, even if the exact amounts aren't the same.
One of the things in Final Fantasy was a "magic spell" taught to you by a broom that told you to Tceles-B Hsup - "push B-select" backwards. It brought up the world map. How can they do that on the iPhone?