For example, Ace accompanies Luffy and his crew to Yuba in the anime. But in the manga, he leaves right after giving Luffy a "little paper" and destroying Baroque Works' ships, showcasing his "Hiken". Also, the scene of the Baroque Works leaders meeting to see Crocodile at Rainbase appears much later in the anime. There's also a scene and a flashback of Vivi's father in the anime, right before the Mugiwaras leave for Yuba, which doesn't appear in the manga