Why is a ring of grit mastery so much cheaper than a ring of ki mastery?

[Hayato Ken]

Gunslingers are already a strong class. Ninjas and monks much less so.
Also grit is refillable by some events whereas ki isn´t.

The price difference is 3160. Ring of ki mastery 10.000, grit mastery 6.840.

[thistledown]

Because you can't actually use the Grit inside it.

Ring of grit mastery has its own supply of grit, that you can choose to replinish instead of your own. But the grit inside of it can ONLY be used for initiative or bullet shield. And each of those is only once per day, so putting 1 grit into it over the day will max you out on uses.

You can't use it to fuel any of your own grit abilities.

Ki mastery doesn't start with any inherint ki, but you can use it as your own ki, and also get other benifits.