Answer:
Christianity and Buddhism believe in peace after death (heaven for Christianity and Nirvana for Buddhism). Both religions believe in consequences for your actions. (Reaping what you sow: Christians and Karma: Buddhists)
Differences:
Buddhism does not believe in a soul, while Christianity does
Christians Pray to God, Buddhist do not
When you die you go to heaven or hell, but for Buddhists there are ranks to Nirvana.