If Naruto was the same age as Kakashi, the power dynamics would be very different. Naruto might be more skilled and mature from the start. He could have been part of the earlier battles against the Akatsuki. Also, his relationship with Sasuke might have a different flavor as they would be closer in age and experience. For example, they might be more like equals in their rivalry, rather than Naruto constantly chasing Sasuke's level of skill.
If Naruto was the same age as Kakashi, his character development would take a different path. He would have likely faced different traumas and challenges growing up. For example, he might have been more directly involved in the Third Hokage's reign and the events that led to his death. This would have made him more politically aware and perhaps more cynical. Also, his relationships with his peers would be different. He might not have had the same close - knit group of friends as he does in the original story, as his age difference would put him in a different social circle.
One possible plot could be that Naruto is already a respected ninja in the village. He's assigned to a special mission to deal with a new threat that's related to an old enemy of Kakashi's. Since he's at Kakashi's age, he has the skills and knowledge to handle complex situations. Along the way, he discovers secrets about his own past that are linked to this new threat. He has to use his experience and the bonds he's made over the years to overcome the challenges.
If the protagonist of Naruto was the same age as Kakashi, they might have met when they were young and attended the ninja school training together. As time passed, they might grow up together and meet under some opportunity to start a thrilling story.
In a more light - hearted plot, Fem Naruto and Kakashi could start a friendly prank war in the village. Since they are the same age, they might have a similar sense of humor. This could lead to some hilarious situations where they constantly try to out - prank each other, but also learn important lessons about friendship and respect in the process.
A great fanfic concept could be a story where Fem Naruto and Kakashi are rivals instead of comrades. With their equal age, they might compete for recognition, for example, in the academy. This could lead to some intense battles and also a slow - burn realization of their mutual respect for each other's skills.
Well, if Naruto were Kakashi's age, the story would be very different. Naruto would be much more experienced and perhaps less impulsive. He would have already gone through a lot of the traumas and growth that Kakashi had at his age. His relationships would also change. For example, his bond with Iruka might be more of an equal friendship rather than a student - teacher like relationship. Also, his rivalry with Sasuke would be on a different level, as they would both be more mature and their reasons for competing might be more complex.
Well, one similarity could be their determination. In the fanfic, like in the original series, both Naruto and Kakashi are very determined. Naruto is always striving to become Hokage and Kakashi has his own goals and missions he's dedicated to. They also might share similar combat styles in the fanfic, perhaps Naruto starts to adopt some of Kakashi's strategic thinking during battles.
Sasuke could be a popular character. He might be involved in the story in a way that either helps or hinders the situation where Naruto hurts Kakashi. For example, if Sasuke tries to stop Naruto from doing something stupid that would hurt Kakashi.
Another reason could be related to Kakashi's past actions. If there are some secrets or things Kakashi did in the past that come to light and Naruto doesn't like them, he could snap at Kakashi. Naruto has a strong sense of justice and loyalty, so if he feels betrayed or misled by Kakashi, his reaction could be to snap.