I nute my girls pretty from the time they have their first leaves, leaves me plenty of time to work into my nutrient schedule. I start off at such a small amount of nutes tho... Generally plants start actually needing some nutrient values after they start putting out real leaves.
Nutrients are nutrients, find one that works for you. People pay much to much attention to how much they are putting into their grow. Your girls have a set list of requirements, pretty much so long as you meet those requirements it won't matter what brand you give em.