Well, the original story has a set path of events and character interactions. In 'Voldemort watches Harry's memories' fanfiction, it takes a huge detour. For instance, Voldemort might learn about Harry's relationship with Dumbledore in a very different way than he would in the original. This could lead to Voldemort rethinking his enmity towards Dumbledore or even trying to use the knowledge of their relationship to manipulate Harry in ways that are completely different from what we see in the books. It also gives the writer the chance to explore different themes like redemption or a different kind of understanding between the two main antagonists, which is not really a part of the main story.
In the original story, Voldemort doesn't have access to Harry's memories in this way. So in the fanfiction, it creates a completely new scenario. It allows for a different kind of exploration of their relationship. Instead of just their physical and magical battles, we get to see a more psychological interaction.
The original Harry Potter story focuses on Harry's journey to defeat Voldemort through his own actions and the help of his friends. But in this fanfiction, Voldemort is given an inside look into Harry's life. This changes the power dynamic. Voldemort may start to understand Harry on a deeper level, which is not something that happens in the canon. It also might lead to different plot developments, like Voldemort having a change of heart or using the memories against Harry in unexpected ways.
Chapter 251, "It seems that going on a transformation show is really useful!", is the clearest early answer because it turns Fang Wenzhe's situation into a concrete plot event. It opens with If Du Qinglian was somewhat angry just a moment ago, now she was...
Chapter 199, "You Found Out Long Ago?", is the clearest early answer because it turns Zhao Lang's situation into a concrete plot event. It opens with Damn, the production team is actually being so generous this time,...
Chapter 474, "Handcrafted Wooden Bed", is the clearest early answer because it turns Brother Pig's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Although everyone besides Jiang Li and Shang Shuyue was red-faced and...
Chapter 639, "Young Master Gu, Does Your Family Need a Dog?", is the clearest early answer because it turns Pei Ye's situation into a concrete plot event. The chapter turns that into something concrete by moving from Half an hour later, Jiang Li pushed open the door and walked out.
Chapter 474, "Handcrafted Wooden Bed", is the clearest early answer because it turns Handcrafted Wooden Bed's situation into a concrete plot event.
Chapter 312, "Charity Gala Invitation", is the clearest early answer because it turns Everyone's situation into a concrete plot event. The chapter gives readers a real answer by opening on Du Sang's dinner party wasn't urgent, because it was still a month...
Chapter 257, "Did Jiang Li Get in Through the Back Door?", is the clearest early answer because it turns Su's situation into a concrete plot event. The chapter turns that into something concrete by moving from This nation seemed to have a particular love for bright colors.
Chapter 131, "This Lady is Here to Travel", is the clearest early answer because it pushes Braised Lion into a new phase or setting. Early on, Just around mealtime, Director Sun came over pushing his small food.... By the end, Hungry, they no longer cared about their appearance, quickly washed....
Chapter 130, "Director Sun: He Got Schooled Again?", is the clearest early answer because it turns Sister Li's situation into a concrete plot event. A useful checkpoint is the way the scene starts with This task, the first one, should have been his in the bag.
Chapter 459, "Even Got Educated by a Variety Show", is the clearest early answer because it turns Su Yinwan's situation into a concrete plot event. The chapter turns that into something concrete by moving from Su Yinwan felt somewhat annoyed but could only suppress the emotion...