I shot a PPC9 6 inch, a PPC 5 inch, a 952 Masterpiece 6 inch, and a 952 5 inch today at 25 yards. All with the same Remington 115gr Ammo 5 shot group. And shot them all two hand supported on a bench with no sand bag. Consider these results simply as a data point as I am out of practice and did not really ring out the true performance of these handguns. The results were PPC9 6 inch barrel best at 2 7/16 inch group, next PPC9 5 inch at 3 inch group next 952 6 inch at 3 3/4 inch group next 952 5 inch at 5 3/8 inch group.
Again these pistols can do way better and if I found the best Ammo for each I expect they would be closer.