People have discussed the difference in Bo-Katan and Din’s fighting styles before, but I think the biggest factor is that Bo has always fought with people under her. A lot of her flashier moves are either set-ups for other team members, or final blows that had been set-up for her by her crew.
Din’s fighting by contrast is a lot more desperate and brutal and plain because he had to learn to fight alone. He’s precise but he’s not elegant, and he fights a lot more defensively most of the time. Like if you watch the way he engages people in combat he tries to avoid direct physical contact because he knows he won’t have anyone to help him if he’s overpowered, but Bo + Co really lean into close combat because they always fight with back-up.
Which might inform part of why she seems to have such a disdain for Mandalorians who are bounty hunters. The way that Boba and Din fight aren’t delicate or twirling or elegant. A lot of the times the way they fight is messy, even if they achieve the same outcome in the end. It runs contra to the careful aesthetic she’s curated as a warrior of elegance and flair. If Star Wars was smarter you could make an argument that this is like, a weird form of tone policing that goes on between higher and lower class Mandos, that Mandalorians of nobility and high birth are principally concerned with the optics of their brutality rather than the brutality itself.
Also the show definitely isn’t this deep but another thing that’s striking is that Bo-Katan and Koska don’t use their armour as a core part of their fighting in the way Din does. Chapter 15 made a point of showing the audience that Din’s fighting style requires the use of his beskar, but we don’t really see the same emphasis with Bo. Her armour is more symbolic than anything else, and most of the time we see her with her helmet off—something we don’t get with Boba or Din. Mandalorian armour for her is more about looking like one because she hasn’t had to like, fight for money and use that money to provide for other people. Even when she was in Death Watch she was a high-ranking member.
My point is that like, Bo-Katan doesn’t have experience being a Mandalorian who has had to survive the hardship of being a Mandalorian. She is always shown in a position of power, always leading a fireteam of some kind. The desperate concerns of finding enough money for basic shit like fuel and food are not things she has to worry about, because she can outsource that to someone under her.
