We all may know we are saved because Christ died for us. This is the difference in Christianity. Where some cultures offered sacrafice it is not the same that they believed the animal took their place, it is more often that they killed it to appease their God. It is more common that religions have a punishment for their followers. It is mostly common that no one takes your punishment. It is also more likely that in other religions you are forced to participate. The actual difference in Christianity is that it offers no punishment and Christ payed for everything you did. People are allowed into Christianity with very little constraint to obey other than disfellowship which is very little to most religions. Christianity offers that you can return simply for forgiveness for Christ and repentance. Repentance is Grace in Christianity that you simply had to stop offending and you were returned to the fold. It is something that draws many people to the kindest religion. No religion can claim they have so many people on the idea that their is no entrance hayzing or punishment or constraint if you leave. Simply put Christ wins in His religion for starting it with the promise of His death that He died for you.