I appreciate all of the feedback and descriptions which are helpful to establish a relationship I'm familiar with. Between the 9's the compact feels a little more lively but both are soft comparative to a Glock or Springfield with which I'm familiar. I've only had the opportunity to try 40sw with a Springfield XD which did have a bit more spice to it compared to the XD9 but it was only in follow-up speed that I felt most impacted which required a slightly more patient cadence.
Given the design of the PX4 it seems like an ideal platform for 40sw which has risen my curiosity.