I own or owned both, and there is quite a difference between the Ruger, which I really like, and the PPS. The PPS is in another class ... Period!
The LC9 is good, don't get me wrong.
Here is my video on the LC9 hours after I bought it!
http://www.youtube.com/watch?v=9fxT79DBa9s
I kept saying LCR, LC9 in the video since I just bought it, and Ruger uses too many LC names anywho!!!
I was not shooting video when I owned the PPS!