The Priest version of the Sphinxstone story results in the loss of 10 echoes instead of the gain of Sphinxstone x 50.
Is this intended or unintended? I’d assume the latter, but the story describes the return of the Player Character’s vestments. I can imagine someone imagining that the reinstatement of the captain as a priest might serve as a reward for the quest. Which it might be in Fallen London, but in Sunless Sea, there’s no direct or indirect effect of such an outcome.