Super short answer is that if accuracy is the ultimate determining factor on the true S&W Performance Center Limited guns, you won’t take top honors if only the 9mm guns are on your list. You’ll smoke any of them with an 845 or 945.

If it’s only about the 9mm guns and it’s only about accuracy, I believe anyone and everyone who can choose either a 952 or a PPC-9 over the other can realistically only be choosing on an example by example basis, because the top ends of these pistols are (basically) exactly the same and the slide to frame fit is as close to same as humanly possible with a hand-fitted pistol.

I’ll put it another way: it’s a false conclusion to say that all PPC’s are more accurate than all 952’s across the board. And vice versa.

It should come down to any and all other factors aside from pure mechanical accuracy if you are forced to choose between these two models.

If what you seek is an exclusive S&W grail gun chambered in 9mm, you will not fail with either model.

Keep in mind that if you want to go with the 6-inch long slide in either model, you are not talking about a small bump in price. It will be a massive bump in price.