No, it is not the same. Einstein proposed a theory which was largely consistent with our experimental evidence in support of Newtonian mechanics. It also agreed

No, it is not the same. Einstein proposed a theory which was largely consistent with our experimental evidence in support of Newtonian mechanics. It also agreed with recent experiments which would not find an aether. Relativity made predictions about the orbit of Mercury that were more consistent with the data than orbits predicted by Newtonian mechanics. In this instance, we have a device which is proposed to work by means that violate basic laws of conservation. There is no accompanying theory for why that is. It has been tested by several groups, and as these groups improve their testing methodology, the resultant "thrust" decreases. That is not promising. If the effect under test decreases as experimental rigor goes up, then the default assumption should be there is probably nothing there.