I believe there is a difference because it is a case of a state against a state and the SC is the only place that a trial can be held for a state against a state.
The SC may rule that the state house in each state will have to choose the electors for that state, and it could mean the state decides to split up the electors however it sees fit after reviewing their states election, or the state could give them all to one candidate or the other, but the SC is not going to determine who gets the electors.