The Circlet of Arkhosia grants:
Property: When you are dazed or stunned, you can make a saving throw against one of those conditions at the start of your turn. If you save, you can act normally on your turn. If you fail, you can make another saving throw against the effect at the end of your turn.
The feat Superior Will grants:
In addition, if you are dazed or stunned, you can make a saving throw at the start of your turn to end that effect, even if the effect doesn’t normally end on a save.
Is there any real benefit from taking both the feat and the item?
Best Answer
The circlet allows a save against one stun or daze effect.
The feat appears to allow saves against all stun or daze effects.
Depending on your reading of the circlet, it may allow saves against non-save ends effects, and if it does so, it actually allows two such saves.