Yeah, technically it would be the same (bonus item generated), just the way you tell it to your players is different, which is important. More so than the technical side most will see.

Yup, although I *thin* items get generated in chests when first interacted with (which locked includes), not mouse-overed (don't quote me on this though, just the feeling I have). Or potentially when damaged too, for chests opened by traps without the player reaching it yet...

It's just like how 'locked' or 'unlocked' appears over characters while walking to the door instead of at the door.