True growth in isekai is measured by the cost of the ascent, not the height of the ceiling. Comparing a YPS-3 physical fighter to a YPS-6 hybrid entity is numerically futile because their powers operate on different planes of existence; one fights within the laws of physics, while the other rewrites them. The real divergence lies in the relationship between agency and power. Sung Jinwoo’s progression is a mechanical certainty, a gamified grind where the System removes the risk of failure in exchange for a loss of humanity. His path to a planet-level scale is an exercise in accumulation. Eris Boreas Greyrat, conversely, achieves her growth through a violent rejection of her own identity. Her decision to leave the person she loves to train in the sword-god style is a calculated gamble on her own worth. While Jinwoo’s Ego score reflects a total dominion over his environment, Eris’s trajectory represents a more profound psychological victory. She transforms from a reactive child into a tempered warrior not because a system granted her a quest, but because she refused to be a secondary character in her own life. Jinwoo becomes a god by following the rules of a hidden game, but Eris becomes a warrior by breaking the expectations of her nobility. The disparity in their YPS tiers obscures the fact that Eris’s journey requires more internal fortitude than Jinwoo’s systemic ascension. One is a story of addition; the other is a story of refinement.