It's a bit hard to say. as the two are so different. In terms of both destructive potential and energy it varies. However, most powerful earthquakes release far more energy and are more destructive than the most powerful tornadoes.
In terms of energy output an earthquake is stronger.
It depends on the size of the tornado and the how strong the earthquake is. Most earthquakes are small on average, so most of the time a tornado is stronger.
It isn't. An earthquake releases far more energy than a tornado.
In terms of the energy output, yes.
A strong tornado is one that is EF2 or stronger. A violent tornado is one that is EF4 or EF5.
earthquake
Not necessarily. Higher temperatures do increase the chance of a stronger tornado forming, but not necessarily. Scientists still don't really understand why one storm produces a tornado while another doesn't or why one tornado is stronger than another.
In terms of energy output an earthquake is the most powerful.
Generally large tornadoes are stronger but that is not always the case.
Earthquake
In terms of the maximum amount of energy released, an earthquake is stronger.
Yes. But the two phenomena are not related even remotely. So if a tornado were to follow an earthquake it would be entirely by coincidence.