Originally Posted by
KalinOrthos
Resonance seems to be something altogether different from or perhaps an offshoot to the Echo. Echo gives us the ability to at least somewhat converse with Hydalaen as well as complete immunity to the brainwashing effects of other primals, alongside the ability to seem to attune to different job crystals. Resonance, however, seems to be exclusively combat focused, giving the wielder Sharingan-ish abilities of prediction, enhanced combat power, and, at least through Zenos, the ability to fuse to and dominate the will of a primal. Both Echo and Resonance seem to be based around aether though, which, honestly, seems like just a catch-all for a-wizard-did-it juice.