Some may feel that Lutherans and Presbyterians are the same but they do have some differences with each other. They have different beliefs when it comes to predestination. The Lutherans have the belief that it will be God who will choose the people who will be with Him in the afterlife while Presbyterians believe that God can determine ahead of time who will go to heaven and who will go to hell.
It does not matter what their faith is. There are some that may not be from the same religion but they will still go to heaven. Lutherans also believe that when you are getting communion, you are taking the actual body and blood of Christ but in Prebysterians, they believe that communion is a representation of what may possibly occur.