How does this monotheistic religion differ from the other two major monotheistic religions?

Christianity differs from the other to monotheistic religions because christians believe in their idea of God is called the Trinity or three in one because Christians believe that god has three parts God the Father, God The Son(Jesus Christ), and th Holy Spirit ( Gods Presence on earth). Also that Christians believe in original sin and that Jesus died on the cross for us in our place to save us from that sin and that he rose from the dead and ascended into heaven and all christians believe in heaven and that those who sincerely repent their sins before God will be saved and join Him in Heaven. Also the Belief in Hell and satan although they vary among groups. And that Jesus Christ is the Son of God who was sent to save us from our sins and died on the cross and rose again on the third day and went into heaven. And that is how Christianity differs from the other Monotheistic religions.