I'm trying to shorten
He grew up in Ethiopia and moved to Canada at the age of 25. Those two worlds (occuring in two different levels), made him see how far man has reached.
...Those two (adjective here) worlds.
I'm looking for an adjective with the meaning described in addition to a figurative meaning of "one higher/better than the other. Off the top of my head, unleveled, unparalleled. I'm not sure those are correct. Feel free to suggest different constructions.