If your a Christian this won't be a hard question.
Well, Jesus is the Savior of the world. He is the only begotten son of the creator of Heaven and Earth. Jesus is not mystical. He is real. He is the Christian faith Messiah.
Zeus was believed to be the Greek god. He was the king of gods and man who was very powerful. He could grant any power requested.
Now, this is my belief of "the difference between Zeus and Jesus"