In the Qur'an, Jesus has been given a number of honourable titles. Since God is eternal, the Qur'an as his rahma and word is eternal and uncreated. No other prophets have been described in such terms. No other prophet nor Muhammad has ever been called the spirit of God.
Islamic belief is incomplete without a belief in Jesus.
In other words, belief in Jesus can earn a soul the paradise of God. Yet Muhammad in other traditions is quoted as saying that he could not give that assurance himself.