I think we've shown fuller spectrum to out perform blurple. What we haven't seen is 3000k 90cri producing more potency or yield side by side with 3500k 80cri.
I don't think this is entirely true. True for cheap, inefficient mono based panels using epistar diodes. But that's all
putting efficiency aside...
In my own grows I can conclusively say that a warm white phosphor spectrum outperforms any primarily red/blue spectrum out there. Even the illumitex F3 spectrum sucks in comparison. Over the past few years I have been working with T5HOs, specialized aquarium tubes, disposable Chinese leds, small diode leds and cobs with various wavelength mixes and testing all sorts of different combinations.
A 90 CRI warm white phosphor grows better than a 70 or 80 cri spectrum, but generally the loss in photons isn't worth it.
My testing work going forward is on how to enhance the typical white phosphor spectrum with the least amount of supplementation for the best spectrum.
As far as genetic response to different spectrums.... while genetic differences to different spectrums are apparent, for the most part most cannabis subspecies, varieties and phenos, respond to the different spectrums in the same way within their genetic capability.
e.g. A short squat wide leaf indica will stretch more under a spectrum heavy in deep red/ far red. But so will a thin leaved tall strectchy pure sativa.