Lutherans: How is your communion different from Consubstantiation?

They do sound pretty much the same, for all intents and purposes. But the Lutheran reformers tended not to use that term because they regarded it as an overly-philosophical attempt to explain the mystery of the Eucharist, much as they rejected Transubstantiation for the same reason. They were content to say that with the bread and wine one recieves the true, substantial Body and Blood of Christ- the details of how this happens are left up to God. The Eucharist is a mystery much the same as how Jesus can be 100% God and 100% Man at the same time. Our feeble human minds cannot wrap around it in a logical way, so you have to accept what Jesus says and leave it at that.