I drilled a Gladiator Solid, pin next to ring stacked, about a 4.5x4.5 drilling for me. I also have the BPR, similar drill but the pin is higher up, about 3/4 of an inch higher than the top of my ring finger. Threw a few games today with both.
They both seem to handle the same amount of oil. I was able to play similar lines, but due to the 2000 surface on the Glad Solid, it read the lane earlier. I didn't get near the track line with either ball and they both found the pocket regularly.
The BPR even with the high polish worked on what I considered a true medium. I would think with a little scuff, it could handle heavier mediums. I am hoping to get a few more games on it to see if it comes to life a little more. It was definitely too strong for a lighter medium shot I bowled on during league.