Oh the whole a-hub vs c-hub thing, I honestly don't understand what the debate is about. C-hub just lowers roll center. That's its function. If you find yourself wanting a lower roll center for your ball stud tuning, use it, else use the A-hub.

I have tried back to back both a and c and A was better on our track because our current layout is all about out of corner punch and a high rear roll center is key. Your track layout and surface determines which to use.