One possible difference could be in the level of detail. The novel might go more in - depth with character thoughts and emotions. For example, in chapter 71 of the webtoon, a fight scene might be shown more briefly compared to the novel, where it could be described with more elaborate language.
Yes, Esperanza Rising is considered historical fiction. It's set during a specific historical period and incorporates real-life events and circumstances.
In 'Esperanza Rising', the story is told from Esperanza's point of view. So, Esperanza is, in a sense, the one telling the story. We experience the events, the joys, and the sorrows through her eyes.