About zero casualties alone, Arabasta may try to compete with Wano. But theres something very different about Wano. Crocodile is a massive figure pre-TS and he didnt disappoint. He made Luffy felt like an ant and made me root for Luffy to win. The fights didnt drag and it felt efficient even though theres gags involved like water Luffy, eating meat with healing etc. But Wano is even more massive, much more. It's hyped since pre-TS, the enemy is WSC and NBD (2 Emperors at once, one of which being hyped by Garp and everyone as unbeatable beings etc etc), and we get WSC being hostage-dependant and wounded by everyone, also we get Wedding Cake, also we get Luffy fighting fodders for 10++ chapters and sacrificing the more important fights/spotlites in the process? Imo its much better in its build-up but the payoffs, execution, storytelling, fights' dragging, pointless gags amount, are much worse than Alabasta.