There are a lot of differences between Roman Catholics and Catholics. Although both are denominations under Christianity, however, the Roman Catholic has a lot of followers compared to the Catholic. In fact, Roman Catholicism is the largest denomination in Christianity. According to research, the Roman Catholic was the main Christian group in the past; however, different groups were later formed from it.
Some members of the Roman Catholic left the group and formed another group known as the Catholic. The Roman Catholic and the Catholic don't agree on some practices and issues. For example, the Roman Catholic Bible contains some books that are not included in the Bible used by the Catholic.
The Catholic believes that the various teachings of Jesus Christ, as written in the Bible, are the same and that there is no need for anything to be added. The Catholic does not have a supreme leader, unlike the Roman Catholic that is subjected to the leadership and the authority of the Pope.