In the original, Harry and Tom are adversaries with a very different kind of relationship based on good versus evil. But in the mpreg fanfiction, they are often forced into a more intimate and complex relationship. Their goals and motives start to shift as they have to deal with this new situation. For example, Tom might have to consider protecting Harry in a way he never did in the original, and Harry has to deal with the implications of being so closely tied to someone who was once his greatest enemy.
The fanfiction also might introduce new magical concepts related to the mpreg that have no basis in the original Harry Potter lore. It could change the way magic is perceived and used in relation to this new situation. For instance, there could be special spells or potions to deal with the pregnancy that are completely made up for the fanfiction, which is a major departure from the more traditional magic we see in the original books.
Well, in the original Harry Potter storyline, there is no such concept as mpreg involving Harry and Tom Riddle. So, immediately, it's a huge deviation in terms of the biological and relationship aspects. The fanfiction creates a whole new set of relationships and character dynamics that are not present in the source material.
The fanfiction likely deviates from the original in terms of character development. In the main story, Tom Riddle's path to becoming Voldemort is more about his own inherent darkness and experiences at Hogwarts. But in this fanfiction, the books he reads could potentially lead him down a different path. Maybe he becomes more empathetic if he reads certain books, which is completely different from his cold and power - hungry self in the original. It also might change the relationships he has with other characters as he has new ideas from the books.
The original Harry Potter story has a very set plotline and character arcs. In contrast, the mpreg fanfiction completely changes the direction. For instance, Voldemort in the original is a purely evil character. But in the fanfiction, the pregnancy might force him to re - evaluate his actions and motives, which is a radical departure from his character in the original books. Also, Harry's role in relation to Voldemort becomes much more complex and less about simple combat.
In the original Harry Potter storyline, Dumbledore is seen as a wise and benevolent figure who is always looking out for Harry's best interests. However, in the 'harry hates dunbledore fanfiction', this perception is changed. It might show Dumbledore in a more negative light, perhaps making him seem more self - serving or having ulterior motives, which is a huge departure from the original where he is a symbol of good and guidance.
In the original 'Harry Potter' series, the relationship between Harry and Snape was one of mutual dislike but also a certain level of respect in the end. However, in this fanfiction, it's a complete break. The fanfiction might change the power dynamics at Hogwarts as well. Snape was a key figure in the school's hierarchy, and his death at Harry's hands would send shockwaves through the staff and students, unlike anything in the original story where his death was a heroic sacrifice.
The original Harry Potter story focuses on Harry's battles against Voldemort and his growth as a wizard. The fanfiction about Harry refusing to marry Snape takes a different turn into the realm of romantic relationships which were not central in the original. Also, in the original, the relationships are more along the lines of friendship, mentorship, and enmity, not romantic love between these two characters.
It deviates mainly in the character identities. In the original, Harry and Hermione are just normal students with their own roles. But in this fanfiction, becoming Remus' pups gives them a completely different identity. They might have new powers or behaviors that are not in the original. For example, they could have enhanced senses as pups.
In the original storyline, Harry and Ginny get married. So in this fanfiction, it's a complete divergence. It might change the whole future of the characters. For example, the Weasley family dynamics would be different without Ginny being Harry's wife. And Harry's own personal development and relationships with other characters would also take a different turn.
It deviates mainly in terms of character relationships. In the original, they are arch - enemies, but in mpreg fanfiction, there's a new level of connection due to the pregnancy situation.
The main difference is the relationship between Harry and Tom. In the original series, they are arch - enemies. But in the slash fanfiction, their relationship is re - imagined in a more, well, romantic or at least a very different way. The fanfiction also often takes more creative liberties with the plot. For example, it might change the outcome of certain battles or events to fit the new relationship concept.
In the original story, Harry and Draco were mostly rivals. In this fanfiction, the handshake shows a departure from that. It implies a relationship shift that doesn't happen in the books or movies. The fanfic might be exploring an alternative path where they can coexist peacefully.