A 'higher law fanfiction' might be different in terms of the moral and philosophical undertones. It could be more thought - provoking as it forces the readers to consider ideas like what is right and wrong beyond the normal understanding. Other fanfictions may not have such a deep - seated moral exploration. It can also lead to different types of character development. Characters may grow not just in terms of their relationships but also in their understanding of this higher law and how it shapes their actions.
Well, it's mainly about the central theme. Most fanfictions focus on the relationships between characters or on specific events in the original work. But 'a higher law fanfiction' is centered around this idea of a 'higher law'. So it's more about exploring the implications of such a law on the story's world and its inhabitants.
The difference could also lie in the narrative structure. Since it's based on a 'higher law', the story might have a more rigid framework in some ways. For example, the actions of the characters could be more guided by this law rather than just by their own desires or the normal flow of the plot. This can create a unique rhythm and pacing in the story compared to other fanfictions.