Howdy! Christians and Catholics share many core beliefs, such as the belief in Jesus Christ as the Son of God and the savior of humanity. However, one key difference lies in the structure and authority of their respective religious institutions. Catholics recognize the Pope as the earthly head of the Church, while other Christians, such as Protestants, reject the Pope's authority and emphasize the direct relationship between the individual believer and God. Additionally, Catholicism places a strong emphasis on sacraments, rituals, and the intercession of saints, whereas some other Christian denominations may have different practices and interpretations of these aspects of faith.
However, there are some other differences that you can learn about here https://biblereasons.com/christian-vs-catholic/.
This article goes into much more detail about the differences between Christians and Catholics. I hope my answer is helpful to you!