tbh, Kuu's tours are never boring and she just seems like she's always so happy and they really really seem like they're very very fan-friendly, like how she talks to the crowd during performances and everything...
that's probably the only thing that Kuu's tours have that Ayu's don't, the constant attention to the audience.
Don't get me wrong, Ayu's tours are mind-blowing, but sometimes they seem a bit over rehearsed like there's no room to get really personal with fans. Like how Kumi brings up someone to the stage and sings to them, i just think that's something that artists should always do because it looks like they want to be close to the fans.
i probably dont make much sense but i get it