The difference between Christianity and every other faith in the world is that all other religions are about man trying to reach up to God. Christianity is about God reaching down to man.
All religions are based upon man trying to be good, to please God. There are two problems with this. One God does not require good, He requires perfection, Matthew 5:48; Matthew 22:37-40. This creates the second problem, none of us are perfect in our religious pursuits.