Christianity developed out of Judaism in the 1st century C.E. It is founded on the life, teachings, death, and resurrection of Jesus Christ, and those who follow him are called "Christians."
Christians believe that Jesus died after living the perfect sinless life taking the place and burden for all of mankind's sin.
Christians believe In Jesus Christ, and that he was God who came down in the human form and that the way to salvation is not through good works but by faith through Jesus (God).
Romans 10:9-10 in the bible says If you declare with your mouth, “Jesus is Lord,” and believe in your heart that God raised him from the dead, you will be saved. For it is with your heart that you believe and are justified, and it is with your mouth that you profess your faith and are saved.
Buddhism was developed out of Hinduism in the sixth century B.C. For a Buddhist salvation is reaching Nirvana. Nirvana is a transcendental, blissful, spiritual state of nothingness when you become a Buddha. To reach Nirvana you must follow the Noble Eightfold Path. The Noble Eightfold Path is
1. Right Understanding: accepting the Four Noble Truths. The existence of suffering; the cause of suffering; the end of suffering; and the end of pain.
Hinduism has no founder or date of origin. The authors and dates of most Hindu sacred texts are unknown.
Salvation for a Hindu is called Moksha. Moksha is when an enlightened human being is freed from the cycle of life-and-death (the endless cycle of death and reincarnation) and comes into a state of completeness. He then becomes one with God.
1. The Way of Action: This involves carrying out certain religious ceremonies, duties and rites. The objective is to perform works without regard for personal gain.
2. The Way of Knowledge: This requires using your mind and philosophy to come to a complete comprehension of the universe.
3. The Way of Devotion: Salvation is reached through acts of worship, based upon the love for a God (there are thousands of gods in Hinduism).
4.The Royal Road: The use of meditation and yoga techniques. This method of reaching salvation is typically only used by wandering monks.
Each of these ways to salvation in Hinduism requires that a person do certain things. Salvation is through what a Hindu does. It is through human works.