Board Thread:Versus Debates/@comment-29994364-20161028174112/@comment-26636534-20161119160041

Part 2 Itachi has more reserves than Part 1 Itachi. In part 1 after using Tsukuyomi twice and Amaterasu once, he told Kisame he needs to rest. In Part 2, during his fight with Sasuke, he used Tsukuyomi once and Amaterasu twice(note he used a prolonged Amaterasu the second time), then proceeded to get up and walk to Sasuke. According to the most of the people on this page, @Kakashisologod included, Prime Itachi is Part 1 Itachi.