Hitler was a fan of Mussolini but he put his own spin on Fascism. Mussolini was fired by his party in Italy and no one in Germany would have dared to try that with Hitler.
They were similar in the way that they both wanted to take over a certain country and eventually take over the world. Also they were both watchful over the League of Natons. They are also similar in the way that they both lost and they both died in the end of all their chaos.