Need to define "superficial similarities? Both are charismatic leaders in the Weberian sense and founders of religion. In Catholic Christian belief, Jesus is both true God and True Man. Buddhism does not consider Buddha as both God and man. Both have ethical system. Thanks and cheers!
The most salient difference involves Jesus's role in salvation. Most other religions require their adherents to obey a strict moral code, perform specific rituals, and participate in worship as a precondition for salvation. These works enable the adherent to reach whatever salvific state is called for by the religion. In Christianity, Jesus as God in the flesh lived a sinless life and at his crucifixion took on the sins of his people. For those who accept Jesus's atoning death on the cross as payment for their sins, the state of grace in which they live and ongoing sanctification by the Holy Spirit enables them to respond in love with worship and good works. In short, in other religions good works precede salvation; in Christianity because of Jesus, good works follow salvation.
Jesus was more than a teacher and certainly not a founder of a religion. He sought to reform Judaism as the one whom the prophets of the old taught about. He did not quote another authority and did not bring a message from God. He was the author of the message he preached. Actually, he was the message. He did not speculate about religion but rather sought to bring humanity into a personal touch and relationship with their Creator. That made him radically different from any other religious leader. All this said, it is important to noted that Christianity stands only on the fact that Jesus died and rose from death on the third day. Without that Christianity becomes merely an exercise in futility.
There ara a lot of human being's common values and aspects that most of the leaders of history share not because they imitate each other but because they reach to same results, especially via investigating human beings common sense and common stock of information and culture. so pursuing some clues to reach to the results that who followed the other mostly leads to nothing
For those who believe in the existence of God ... God reveals himself, shows himself, in the happening of the history of humanity. For Jews as well as for Christians, God reveals himself to Abraham, shows himself to Moses and from there to many others. The culmination of his revelation focuses on Christ. In the words of Christ himself: "He who sees me sees the Father."
The message contained in Jesus' preaching, and I agree with one of those who have responded, is not intended to create a new religion: "I came not to change the Law but to give it its true meaning" (words of Jesus). The Jews chose to, as historically known, take Jesus to the cross and expel and persecute his followers. From there this group organizes a cult with organized beliefs and for that reason today it is spoken of Christian religion.
Not so with Buddhism, this is not religion. Nevertheless in the buddhism there is one, still incipient for the divinity, philosophical construction humanistic that seeks to accede to the transcendence.
I see more differences between Jesus and Buddha than similarities
To add one more brief perspective, Islam teaches that God sent many, many prophets and messengers to the peoples of the earth – over a hundred thousand, according to the scholars. All prophets and messengers taught the same basic belief, which is that God is the only One Who deserves to be worshiped, because God is the Creator of everything that has come or will ever come into existence, and all the creations need the Creator in order to exist.
Most of the names of the prophets have been lost or their messages misconstrued in history. But some of their names are recorded in the Qur’an and the Bible before it. Islam recognizes Jesus as one of the five greatest prophets who ever walked the earth (in addition to Muhammad, Abraham, Moses, and Noah).
Buddha, like many other historical religious leaders, is a figure not traditionally associated with Islam. But it is entirely possible that he and his teachings belong to the large number of prophetic traditions that have been redefined into other religions over the centuries. If so, then, hidden under today’s Christian and Buddhist doctrines, there is a very deep, core similarity between Buddha and Jesus, just as there is between Jesus and all other prophets.
I haven't actually seen here the obvious similarity that may be down to influences outside of the Near East, that of non-violence. Near Eastern religions then and since labour on and within violent cores, historically acquired (possibly) from Middle Bronze Age Mesopotamia. Non-violence demonstrated a change in direction for the Abrhamic religions, an isolated one unfortunately.