The Catholic mass is the same everywhere in the world. The readings are the sames and the mass structure is the same commemorating Jesus’ sacrifice on the cross through the Holy Eucharist. It is one of the greatest aspects of the Church. Where ever you go in the world you can attend mass and know that it is the same as it would be if you were at your local parish.
The parts of the mass that are different are possibly the language, depending where you are and the Homily.
The Homily is the sermon portion of the mass given by the Priest or Deacon. It is the segment of the service in which the Priest celebrating the mass discusses how the daily readings from the Bible relate to issues of the day and other moral and religious points he wishes to make.