I go back and forth without noticeable difference. I carry an enhanced elite (w/ Hogue Magrips) on duty and have thousands of rounds through the 226 platform. Recently picked up an x5 and the only difference I noticed is it's less sensitive to my grip. With the 226 I have to focus on keeping support thumb away from the frame to make sure the slide locks back. Non-issue with the x5, haven't had it not lock back yet through 1K. I've owned a few regular 320's in the past, the x5 is my preference. Another interesting thing is I need the large grip with the regular 320 to prevent left impacts, but the stock x5 grip shoots POA/POI.