Some fanfictions might make Naruto older than Kakashi by giving him more time - sensitive achievements. For instance, if Naruto has been on more long - term and important missions over a longer period compared to Kakashi. This would give him a sense of having more years of experience and thus being older in the fanfiction world.
In certain fanfictions, Naruto's age could be emphasized as older in relation to Kakashi through his relationships. Maybe he has a protege or a student of his own while Kakashi is still in a different stage. This role - reversal in a sense can depict Naruto as being older in the context of the story.
Well, in some fanfictions, Naruto might be shown as older by having him achieve higher ranks earlier. For example, he could become Hokage before Kakashi in the fan - made story. This would signify his more advanced position and potentially imply his older status in terms of experience and leadership.