After a lifetime of observation, I believe the way of Jesus is true and is distinguishable for at least this - it alone prescribes the way of hope of "salvation" without the use of human effort, devise or ingenuity.
Sounds simple, obvious, but in fact apart from every religious system the way of Jesus alone deals with the core ontological human dilemma - that we are incapable by our own efforts to do what so desperately needs to be done.
Islam, Hinduism, Buddhism, Judhism (incomplete Christianity), quasi-Christian cults; all offer a hope for the life to come. But only Christ-centered faith declares "YOU can't do it! - you are tragically and undeniably a mess."
One need only to recall the most basic observations of human history: the slaughter of children at a school-yard in Connecticut, the genocidical mania of a culture under Hitler, the graves of Stalin, Pol Pot or the rape or abuse of a child - you cannot deny that man, humanness is a moral catastrophe. Sick and beyond hope in and of itself.
So how is it possible that this same collective moral disaster heal itself or rectify this insanity? By it's own effort, by "pulling itself up by the bootstraps"?
Apart from the core debate of philosophy, (does God exist?) one can at this point begin to address the question, "which god is true?" And from consideration of the human condition alone, only Christianity sees that...
"there is salvation in no one else, for there is no other name under heaven given among men by which we must be saved.” - Acts 4:12