Board Thread:Debate of The Week/@comment-28112409-20171002223259/@comment-32942597-20171004154158

As Desert said, Mafia is like a battery and motor, the Deception roles(Battery) provide information and assistance to the killing and support, giving it a more stable system.

The Coven is quite different, they are like multiple motors with a few wire connecting them, allowing them to share energy, but if one motor fails, it may screw up the whole system, or the system will be fine