Stark is a special case of trusted setup. Starks give you a way of generating a receipt for ten coins without showing you first of all which coins they are and without giving you all of the information that went there but still you get the same assurance that it is correct. Now because this is the only cryptography that a stark uses you also get additional benefits one of them is plausible post quantum security I say plausible because of course we don't know even when a new understanding in the efficient quantum algorithms would prove otherwise. So these are two advantages that operate out from the feature that we're only using sort of these knowledge of like hash functions in our construction.