[Oh good job, now you've got her thinking about that.]

...I had not considered that. Under the circumstances of my arrival there, I would surmise it is the latter, but I could not say that for certain.

[Echo takes a moment to think. And maybe start jotting down a note about this in her journal.]

Unless there are others who have been to additional worlds or have undergone changes in coming here, it likely cannot be answered for the time being.