Oars fight was better.
Supernova vs Kaido was really a long stretch of individual cool moments without anything much in the way of choreography. It was like a turnbased battle. Also, Big Mom was weirdly ignored for most of it as everyone attacked Kaido.
Oars fight had everyone involved, was fun, had decent tactics and choreography. like Franky building a stair, Zoro’s pillarswords, the jenga towers, freezing Oars, Sanji’s chain.