christianity came after hinduism, christianity has no original concepts of its own. good example, ash wednesday, you put ash on ur forehead, what we will all be when we die, a sign of Jesus' sacrifice. well the hindu shaivites do it, the ash on the forehead with in a horizontal position which means the former, we will all become ash, return to the earth.
a coincidence?
buddhism has the concept of salvation. of course in my mind, salvation is the same as enlightement. why? because when you know the truth, you shall be set free and saved. the truth shall save you. thats why knowing the truth is important, the truth is different for everyone, but everyone seeks it. identifying God as krishna, or jesus, or brahman is irrelevent. i mean, they are valid pathes, but in reality, what are we seeking? spiritual happiness, the truth.