Address A. The 852E3164.
Remember, in the results, you get three bits of info: Address, Offset, and Value.
Disregard the Value, Address and Offset are all you need. Address is always going to be the address you use when you make your code.
$3201 852E3164 000000F8
$3300 00000000 42100000
Not everyone wants to go through the hassle of using a save editor, however. Especially if you happen to be playing a game that uses stacked data clusters. You'd literally have to edit the game every time you want something to change, because the data may not be there before certain things transpire. Rage for PS3 is like that. You can't just hexedit in an item you don't have and add to the amount. You have to find at least one of the item, save your game, then edit your save. And that can be irritating.
Live cheats are better because they save time and effort.
However, I do admit that for some games, a save editor is a better idea. Games where the values jump around like frogs on fire are really frustrating to make cheats for. RPGs, at least in previous generations, usually use fairly static data, so editors and live cheats are really on par with each other. It boils down to convenience, really.
Plus, people finding codes helps others who are trying to learn how to make them. It's important that people be able to see what others are doing so that they may improve their skills. The Vita is new territory, cheat engine-wise, so the more people figuring stuff out, the better.