I've got a hankering for a modern-day magic type of game, with feuding secret societies, weird apprenticeship rituals, and awful secrets Man Was Not Meant To Know. I know Sorcerer can do this. But I don't know anything about Mortal Coil.
People who have played both - what are the salient differences? What's Mortal Coil like in play, when compared to Sorcerer in play?