lol, love it when someone decides to rename a known occurrence. The “chimera effect”. LOL. Its called variegation, plain and simple. Variegation can be one leaf, or an entire plant.
A couple of points here. I had a variegated grown side by side from seed with a sister that was not variegated. It was the plant in my profile pic actually. The variegated DID take 2.5 weeks longer to finish, and was noticeably slower growing the entire time. The smoke was the same, same potency, same taste / harshness (I expected the white buds to taste different due to lack of chlorophyll but that was not the case). Other than the slower growth (presumably from the lower chlorophyll content), for all intents and purposes, the plant was the same as non-variegated once cured and in jars.
Variegation is hard, if not impossible to lock into cannabis (short of cloning a photo thats variegated). Reason being it has to be passed on from the mother (males DO NOT pass on the trait), and even then, you need the right mix in the environment AND within the cellular level of the plant. Plants can have the genetic material to be variegated, but if the cellular “stars don’t align”, it will not present as variegated. Sadly we only know how to control the environmental variables, and not the cellular variables that will force the plant to present as variegated. There was another user here (her name escapes me at the moment) who educated me on variegation quite a bit when I had mine.
Breeding with it could be fun, but keep in mind the slower growth (as @cannabissequoia mentioned, its not an improvement). I figured a variegated purple / white would make an awesome landscape plant that has a purpose at the end of the season too 
Only way to really do that is find / make the mother and clone the shit outta her (actually thats how many of the current cultivars of coleus are made and sold in big box stores. They are all cuttings as coleus will NEVER breed true from seed, seeds are always varied in coleus).
chlorophyll & all
