What difference do you read into the ideas of original sin versus death? They are different aspects, not true doctrinal differences.
Whatever.
..."vicarious atonement, was first stated by St. Anselm in Why God Became Human (1197-98): only human beings can rightfully repay the debt which was incurred through their willful disobedience to God, although only God can make the infinite satisfaction necessary to repay it; therefore God must send the God-man, Jesus Christ, to satisfy both these conditions. Anselm's doctrine, slightly altered or elaborated, has become part of Roman Catholic theology and of that of many Protestant churches." www.encyclopedia.com
Mark, why did God become human? To whom was a debt owed? God or the devil?