I was asked, in the VP9 - Sig 320 thread, to post some comments on the PPQ and VP9.
Eager HK fan boy that I am, I got an early VP9 last summer, with the help of a forum leader. I sent it right off for installation of HD sights. A week ago, on the recommendation of Bill Wilson, I got a PPQ M2 for my wife. I shot the VP9 last summer, occasionally since, and then side by side today with the PPQ.
First, the dimensions:
Barrel PPQ 4.0 VP9 4.09
Mag capacity 15 each pistol
Height PPQ 7.1 VP9 7.34
Width PPQ 1.3 VP9 1.32
Weight PPQ 24 VP9 25.26
(dimensions/weights from manufacturer websites)
I left both out, next to each other, the last few days. They are so close, it is hard to tell which is which, with the lights off.
Lots of similarity. Both are accurate. Both seem reliable. Both grips feel good, and both grips can use some texture at the top of their grips. Magazines both look good. On one hand you have HK P30 mags. With the Walther you have Mec-Gar made factory magazines. The Walther 15 rounder is a tad shorter than the HK 15 round magazine, and there is the option of easily available 17 round mags for the PPQ. Both pistols feel high quality, although I would give the slight edge to HK, since I have owned and loved their products for years.
Based on my experience with HK customer service over the years, and Walther CS when I had a P99 problem, I give the edge to HK on CS.
In terms of appendix carry, they seem about a wash. The Walther has more initial take-up than the VP9, but then shorter reset. Neither striker can be blocked like the PPS.
Now the subjective. In shooting characteristics, they seem very much different to me. While they are close, I can get higher on the PPQ. When I draw, I try to get as high as I can, and if I am a tad high on the PPQ, I just slide down into place like on a Glock. With the VP9 that overhang in back is pronounced enough, I have to get under there. The big difference is the trigger (at least on my two copies). The PPQ has the best stock trigger I have felt on any striker pistol. It is light, with some roll, and a very short reset. The VP9 has more of a wall, and in this regard is Sig 320 like.
Shooting a one inch square at 7 yards, I put the first three rounds out of the VP9 into one hole. When I try to go fast, though, with the VP9, like with Garcia dots, or shooting an 8 inch steel at 30 yards, the wall on the VP9 really makes the PPQ trigger head and shoulders better. When I pulled my Gen 4 19 with minus connector out, it was amazing how much easier the PPQ trigger is to hit with on low prob targets.
Finally, even though the dimensions are very close, the PPQ seems to carry more like a Glock 19 sized pistol, and the VP9 carries more like a short barrel Glock 17.
They are both great pistols, but the PPQ is especially impressive. If HK had licensed this design from Walther five years ago, when Glock was stumbling with reliability, the M&P was dealing with accuracy, and the 320 was still a Sig 250, it would be interesting to see how much market penetration it would have by now.
I am not sure my wife is going to get the PPQ back.