In RWBY fanfiction, the Weiss vs Winter fight can be a display of their different combat styles. Weiss is more about grace and precision with her Glyphs, while Winter, being more experienced, has a more refined and perhaps harsher style. Their fight could also explore their complex relationship as sisters.
Jealousy is a common reason. For example, if one wife has a more luxurious lifestyle or gets more attention from others. Another reason could be competition, like competing for a limited resource such as a particular job opportunity in a small community where their husbands work at the same place.
One of the top stories was their intense rivalry. They had two very close and controversial fights. In their first encounter, the draw was a huge talking point as many thought Fury had done enough to win. Another story was their different fighting styles. Wilder with his powerful punches and Fury with his more technical and mobile approach.
In the novel," Full Time Expert," there were many plots about fighting. The more famous ones were the battle between Ye Xiu and Han Wenqing, Dragon Raises Its Head, and the battle between Ye Xiu and Sun Xiang, One Autumn Leaf and Blossoming Chaos. In addition, there were also some fights between other characters, such as Yu Wenzhou and Huang Shaotian's Blade Master battle, Su Mucheng and Tang Rou's Launcher battle, etc. These plots not only showed the strength and skills of the characters, but also added a lot of exciting fighting scenes to the novel.
While waiting for the anime, you can also click on the link below to read the classic original work of " Full-time Expert "!