2 sides…err. technically 3 but the third is the non-dual combo side 
Every path is “unique” simply by definition of you being “unique” and at “this” time in “this” place.
That said, there’s literally only ONE of us here
That “One” is occupying all the things and all the times… so the “ONE” also means it’s also “unique” and “alone” ie “all-one”
In the meantime, the ALL-ONE-NESS needs potentiality…so from a strictly electromagnetic perspective, it needs a “positive” charge and a “negative” charge…like a battery to create energy and “power”/experience/growth.
Anything/anyone without enough “charge” is basically “useless” for generating energy …
(Note - the “third” non-dual option/side is doing the ultimate electrical work all thru their own balancing of the dualities in their time/space and space/time. They would not apply as being “useless” but the ultimate useful in generating energy/experience)
There’s only so many “paths” for this “solar system” in “this universe” right now.
Any other path is going to be one of those “proven” paths with slight variations.
I suspect the “next” universe, for those of us who graduate this one, will have either 5 or 7 paths “proven” paths. (still working out if it’s 1,2,3,5,7 or 1,2,3,7)