Experiment some, but remember even a high bar squatter keeps the bar on his traps and NOT on his spine. As far as transferring better to athletics, if your getting stronger then you'll be good, whichever hold you use.
If you really want to shift the focus of your lift then where you break is more important anyways. Break at the hips and you're going to bend over more and use more posterior chain, break at the knees and you'll get more quad. By break, I mean the first thing to move when you start your squat. I break at the hips, which means the very first things that happens when I squat is that I stick my butt out and bend my hips.