AFAIK, the two first are the same. By being elected king of the Germans you became (after Henry IV) "King of the Romans".L.J. Hiertha said:If it's about becoming Holy Roman Emperor of the German Nation (old emperor Otto's formula from the 10th c.) IIRC the sequence goes like this:
First you need to be crowned King of Rome.
Then you have to be elected, yes elected, King of Germany, in Germany.
Then the Pope can crown you Holy Roman Emperor.