The OG Kush are all asexually propagated daughters of the same mother- the same individual plant.
There are no seeds and no phenos.
There's no purple version- it's a delicate pale almost pink color.
There ARE three lines, though- over time, cuts that made it to different region started to show subtle, yet noticeable, mutations.
Eventually these cuts were named: SFV (San Fernando Valley), Ghost, and Abusive.
I run the abusive. It's the lankiest of the three.