The power gap between a YPS-3 and a YPS-6 is an unbridgeable chasm, rendering any direct combat comparison irrelevant. However, the distance between their narrative motivations reveals a critical truth about isekai progression: raw output is often inversely proportional to character depth. Goku exists as a ludic engine, pursuing strength for the sake of the game, which renders his YPS-6 status a function of plot rather than personal transformation. His ego is total because he is never truly challenged by his own internal limitations, only by external opponents. Eris, conversely, treats her YPS-3 ceiling not as a limit, but as a wall she must break through to earn her own agency. Her decision to leave Rudeus to train in isolation is an act of narrative courage that Goku never replicates, as Goku’s journey is a series of upgrades rather than a fundamental restructuring of the self. Where Goku’s growth is an additive process of multiplying power, Eris’s growth is subtractive, shedding the baggage of her noble upbringing and her dependency on others. The tension in Eris's story comes from the agony of the gap between who she is and who she needs to be. In Goku's world, the gap is just a target. This makes the lower-tier combatant the more compelling study in willpower, as her struggle is against her own nature, while his is merely against a stronger alien.