If you want to target both anterior and posterior chain, you need to do both. A low bar wide stance squat is relying mainly on posterior chain stuff, and usually cannot be done quickly. A high bar squat is more quad dependent and you can rocket those down and out of the hole. OLY style.
Good to know. Ive always stuck to high bar as its far more comfortable for me and I have had some low back issues which low bar seemed to accentuate. Ill try incorporating it a little in the future and see what happens though.