A common assumption is that feminized plants yield more than regulars, but the process does not change the plant’s potential. What changes is the yield per seed purchased, since none of the seedlings turn out to be males you have to remove. This distinction, and how it affects planning for a given tent size, is laid out clearly at https://queenfeminizedseeds.com. Any difference between two lines comes from genetics and growing conditions, not from how the seed was made.