well put, the strain has what it needs and what it can handle. You can give it what it needs and it will grow....you can give it more that what it needs within its limits and you have a better yield and high...there are so many factors and you can only grow that one plant one way at a time, i think both are important but ultimately it is about how you care for the plant and treat it that determines the outcome.
I have the same strains as a buddy and i use FFOF, FF trio nutes w/solubles and i use LED. My buddy uses HPS and only the FF TRIO...our pots are exactly the same...
what we are seeing is that his plants are way taller due to the lights, my plants are shorter and bushier...i think this is just LED vs HPS
Mine are budding way faster and the sites are a lot bigger, i believe this is due to the fact i am using the solubles and they are geared to increase buds and flowering....point is the nutes are increasing the plants yield i believe. Not to mention i had LED's and i am kicking his ass with his HPS. Mine look 4 weeks older ahead of his...