你的分析好scientific亦reasonable

a和b是twins, 若their parents有心把她們分開(eg, send a to study abroad or treat them differently)，這樣，their fate will be more different than they are always together.

如看她們的少年運的不同，is it reasonable to place more importance on 父母宮(their parents' impact on them)？

如看她們的中年運的不同，is it reasonable to place more importance on 夫妻宮or 事業宮？

but i think biologically they are similar because they possess similar genes