Banana Fish is not based on real events. It's a fictional narrative that takes the reader/viewer into a made-up world with its own unique plot and characters.
Banana Fish is purely fictional. The plot, characters, and events were all imagined by the writer to create an engaging and unique narrative. There's no real-life inspiration behind it.
Well, first, try searching on AO3. There are tags related to Banana Fish. You can look for fanfics with high kudos or a lot of bookmarks. These usually indicate that other readers have liked them. Also, follow some Banana Fish fanfic writers on platforms like Twitter. They might announce when they release a new, potentially great, fanfic. And don't forget to read the reviews of the fanfics. If a lot of people are praising it, it's likely to be a good one.
Overall, there are noticeable differences. The manga often provides a more comprehensive and nuanced exploration of the themes and relationships. Adaptations might make some changes to fit the medium or for creative reasons.
One of the great Banana Fish fanfics is 'The Aftermath'. It delves deep into the characters' lives after the events of the original story. It really captures the essence of the complex relationships between the characters. Another good one could be 'A New Beginning' which gives an alternative take on how the story could have progressed. It's interesting to see the different paths the characters could have taken.