The fallacy of comparing a YPS-4 authority-type to a YPS-5 physical-type is that it mistakes tactical utility for raw output. Because their power types operate on different axes, the YPS gap is irrelevant; the real divergence lies in their relationship to agency. Demiurge functions as the hidden engine of the Overlord narrative, transforming Ainz’s improvisations into a coherent geopolitical strategy. His elevated Ego and Growth scores reflect a character who does not just serve a master, but actively constructs the master's legacy through psychological warfare and the systematic harvesting of humans for parchment. He is the primary driver of the plot, filling the vacuum of Ainz's insecurity with his own efficiency. In contrast, Diablo operates as a static deterrent. While his YPS-5 status allows him to devastate continents, his narrative function is purely reactive. He curates Rimuru’s environment and manages the Black Numbers, but he never dictates the direction of the story. Diablo’s obsession is a spiritual fixation that renders him a tool, whereas Demiurge’s loyalty is a professional partnership in cruelty. One is a sculptor of empires; the other is a high-end ornament. The contrast reveals a fundamental truth about the 'loyal monster' trope: power is meaningless unless the character possesses the will to impose their own interpretation of the world upon it.