I'm really enjoying bannerlord but I wouldn't say it's better than warband. I see them as two completely different games, Warband and NW hit that niche group perfectly. The game is perfectly broken and I don't think we'll see anything like it again, the community, gameplay, and events were just perfectly broken.
I really enjoy the cav in bannerlord, it moves more like a real horse. I know it's cringe but I ask my mum who rode horses and she said it moved properly. But those are all just opinions!