I'm able to only echo that. A single could possibly be "improved" than another with regards to the standards. Typically, the 9mm has my vote And that i individual much more 9mm handguns than .40S&W. My two PPCs are 9mm (Sub2000 & CX4). Having said that, I do such as the 40 S&W a lot and just acquired a Beretta APX that I actually like.The SIG Sauer