The tendency today is to relativize all religions in the name of pluralism. This is accomplished mainly through maximizing the moral similarities and minimizing (or completely ignoring) the theological distinctives found among the world's religions (Handbook of Christian Apologetics). But while it is true that most religious traditions can come to general agreement regarding what constitutes a morally good person, there are some profound differences regarding who/what God/god/gods is/are and how we can be rightly related to him/her/them/it.
Along those lines, it has been observed that the most important difference between Christianity and all other religions is Jesus Christ. And the most important difference between Jesus Christ and all other religious leaders is Jesus' claim to be God - a claim backed up by innumerable miracles, the greatest of which was his own resurrection.
Christianity is so vital because it is the only religion that 1) offers the true teachings of Jesus and 2) binds together the true followers of Jesus.
As important as the Christian faith is, however, we should be quick to remember that in the final analysis only personal, committed faith in Jesus - not a religion - can save us. In other words, it's not about a religion, it's about a relationship.
"(28) Come to Me, all you who labor and are heavy-laden and overburdened, and I will cause you to rest. [I will ease and relieve and refresh your souls.] (29) Take My yoke upon you and learn of Me, for I am gentle (meek) and humble (lowly) in heart, and you will find rest (relief and ease and refreshment and recreation and blessed quiet) for your souls. (30) For My yoke is wholesome (useful, good -- not harsh, hard, sharp, or pressing, but comfortable, gracious, and pleasant), and My burden is light and easy to be borne." -- JESUS (Matthew 11:28-30, Amplified Bible)