The Banana Fish anime doesn't fully encompass the entire manga. Certain elements might be missing or adapted differently. However, it does a decent job of presenting the main plot and key characters from the manga.
The ending of the Banana Fish anime aligns with a certain part of the manga. It's around a crucial juncture in the story, where major events unfold and character arcs reach important milestones.
In general, the Banana Fish anime is a decent adaptation of the manga. Some details might be changed for better animation or pacing, but the core elements remain the same.
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.