The true divide between these two archetypes lies not in their capabilities, but in the nature of their evolution. A direct YPS comparison is fundamentally broken here; pitting a YPS-3 physical combatant against a YPS-7 entity who rewrites physical laws is a category error. Instead, the real analysis emerges from their DNA Growth profiles. Eris represents subtractive growth. Her journey is defined by what she gives up—her noble status, her security, and years of intimacy—to bridge the gap of her own inadequacy. Her mastery of the blade is a hard-won victory over her own nature, making her ascent a narrative of self-actualization. Rimuru, conversely, embodies additive growth. Every evolution is a consumption of external assets, from the Orc Disaster to the acquisition of Ultimate Skills. Rimuru does not overcome internal flaws; they simply iterate their system until the world conforms to their will. While Eris fights to be an equal partner in a relationship, Rimuru builds a federation to ensure collective comfort. This reveals a core tension in the isekai genre: power as a grueling path toward personal identity versus power as a logistical tool for systemic management. Eris's struggle to be "enough" carries more emotional weight than Rimuru's effortless transition into a force of nature, proving that narrative resonance is often inversely proportional to YPS tier.