Ok let's say that Kakashi is a Jinchuriki. He hosts the Kyuubi, so he has unlimited stamina and chakra(well almost). That means he has like 100x tries with Kamui, and he can use all 1,000 jutsus in one battle. He also can break free from genjutsu easily aswell.
Vs.
Itachi, and he is the host for the Gobi(Five-Tails). So he also has a huge chakra reserve, but not close as much as Kakashi. Itachi has MS also, with all it's powers.
Vs.
Itachi, and he is the host for the Gobi(Five-Tails). So he also has a huge chakra reserve, but not close as much as Kakashi. Itachi has MS also, with all it's powers.