Who wins?
Whole Cake Island vs Skypiea
Whole Cake Island wins 78% to 22%. 20 more put them in the same row. From One Piece Arcs Tier List. Pick a side.
throwaway82227 on Whole Cake Island: Sanji's arc and Katakuri, people sleep on it
throwaway39181 on Skypiea: easily S tier and the blueprint for the entire story, fight me
One Piece Arcs Tier List: the full ranking