There was a big difference in good staff blood presuming thats what was available at the time and Id say the real reason them men used it was to churn out the puppies and thats a good while back to, it would be hard to judge old staffs to APBT I certaintly wouldnt consider APBT supperior to old game staffs is'nt grand champion barney staff x APBT ?.
Now wheatens are them selves hairy gamedogs with lots of staff and EBT added,I can remember a 3/4 pit 1/4 wheaton that was doing very well into pure APBT