The author got tired of memorizing item stats and comparing them manually, so he created a UI that shows the difference between the items being compared.
Better Stats is a work-in-progress mod for PATAPON 2 that helps you compare equipment while browsing gear in Headquarters.
Open the Headquarters equipment menus. You pick one item manually – it becomes the baseline – and as you hover over other items with automatic selection active, the overlay shows the stat difference between the hovered item and that baseline. The UI appears automatically while you stay in Headquarters and hides again once you leave.
Copy BetterStatsMod.dll into your game's plugin folder:
{Game_folder}\BepInEx\plugins
Hopefully these will be cleaned up in a future update.