In this kind of fanfiction, Itachi might use his powerful Sharingan abilities. He could perhaps create illusions to mislead Orochimaru and his minions, then quickly snatch Sasuke away. For example, he could make Orochimaru think that Sasuke is in a completely different location while he secretly approaches and rescues him.
In many fanfictions, Sasuke starts as a character full of anger and a thirst for revenge. But in the context of a relationship with Itachi, he begins to soften. He starts to see Itachi in a different light, beyond just the person who killed their clan. Itachi, on the other hand, is often portrayed as a complex figure with many secrets. In these fanfictions, his love for Sasuke makes him more vulnerable and human. For example, in some stories, he reveals his true motives to Sasuke, which changes their dynamic.
It changes it significantly. Naruto being older might mean he doesn't idolize Itachi in the same way. He may see Itachi more as an equal or even a rival. For instance, instead of blindly following Itachi's lead in certain situations, he could offer his own solutions based on his more mature judgment.
The exact number of years Li Chengqian was older than Li Zhi was not mentioned. Therefore, I don't know how many years Li Chengqian is older than Li Zhi.
Ye Xiu and Su Mucheng were the same age in "Expert", both born in 1987.
While waiting for the anime, you can also click on the link below to read the classic original work of " Full-time Expert "!
I think young Sasuke would have a very intense reaction. He was so consumed by his hatred for Itachi at that young age. A Sasuke vs Itachi fanfiction would be like a trigger for him. He would be eager to see how the fictional fight is portrayed. If Sasuke in the fanfiction is shown as strong, it might fuel his own ego and make him strive even harder to become powerful. However, if the fanfiction shows Itachi as superior, it could enrage him. He might feel that it undermines his own goal of defeating Itachi and he might even want to find the writer to correct their 'wrong' view.
Sasuke would likely become more protective. Usually Sasuke is very focused on revenge and his own power, but when faced with baby Itachi, he would feel the need to shield him from all harm. His cold exterior might soften a bit as he looks at the innocence of baby Itachi.
Well, if Naruto is older than Itachi in the fanfiction, it could lead to a role - reversal of sorts. Naruto might take on a more protective or mentoring role towards Itachi. He could use his experience and power, which he has gained over more years, to guide Itachi in a different way compared to the original storyline.
There's 'The Elder Naruto'. Here, Naruto's age gives him an edge in understanding the political situation in the ninja world earlier. When dealing with Itachi, who is still involved in his complex web of secrets, Naruto can approach the situation with a more mature perspective. He can start to unravel the truth about Itachi's actions and motives much quicker than in the original storyline.
Sasuke might develop more patience. Since Itachi is younger in this fanfiction, Sasuke has to be more understanding. He can't be as impulsive as he usually is. For example, he might have to learn to soothe Itachi when he's scared or upset, which helps Sasuke grow into a more empathetic person.