>>38965450>>38965535>>38965854The difference is in the way the battles are presented.
Sword and Shield is clearly going for a more grounded presentation. Attacks are more to the point and while they have flashier particles, they're not very cinematic.
Old Brave Bird was basically a cutscene whereas the new one is a similar motion but done as just a regular attack.
Honestly, I prefer the new one. If I gotta watch that shit hundreds of times, I'd prefer the simpler one that can be viewed from multiple angles rather than the same cutscene over and over.