I prefer to think they're quantum entangled clones
I wish everyone stopped asking for explanations for everything. This is a game for god's sake. Why haven't you asked the devs for detailed blueprints of our FSDs yet?
Games have more lore than most books and movies for the most part.
Lore is to me more powerfull than ''normal'' story telling. it lets you feel that something is real.
It being a game only means one thing : its interactive.
It being interactive does not mean they have to give us a shallow universe.
There is a difference between lore and realism.
I would like a blueprint of the FSD , it would be a bunch of mumblejumbo on a cool drawing , but it would aid the immersion and the feeling of being in a real world.
There is a reason why in StarWars the authors have independent calandars (that they have yet to share with us , grrr) for nearly every culture , there is a reason why they have detailed inner workings for ships and so on.
Its for continuty (not talking about the EU , but canon as the EU was mostly made by non lucasfilm authors working in freelance without QA)
I hope I dont come across as rude or anything , but they are simply not clones or anything else.
They are whatever the lore tells us they are. the lore can not be bent by players (outside of gameplay)