Pro-CG only makes sense on an asymmetric ball. The CG is considerably out of line with the pin-MB. Pin lengths and top weights might be fine. It could be a benefit or a hindrance, depending on how you want to lay out the ball and which way the CG is offset. Offset to the left for a right-handed bowler means you can put the MB almost anywhere you want and you won't need a weight hole. For a lefty, though, they're stuck with the MB pretty close to the thumb if not in the track.
Pro-pin balls are balls with long pin lengths, at least 5". Could be 9-10" even. Top weight might be goofy, too.
Both are a way for (mostly) Storm to recoup their losses by making some money off a 2nd quality ball. They're not considered first quality, though the core and cover are the same as on first quality balls. Could be a good deal, could be very hard to drill.
SH
