Well, i would have to say 9mm.
You shot a 9mm, and you liked THE 9mm. So get the 9mm unless you shoot a .40 and like the .40
Im a Pretty big .40 fan overall but looking at the quantity difference between those, id go with quantity over size. A hit with a 9mm is better than a miss with a .45 and those 16 9mm's give you a much better chance. Also, with Ammunition as amazing as it is now... I have absolutely no problem trusting my life to a quality defensive 9mm hollow point. I personally test ammo on different media's and have found that the Speer Gold Dots and Corbon DPX's are the cream of the crop.
Some will argue that a .45 that doesn't open in a person is still .45" and a 9mm has to work properly to get to that size. On some guns where capacity is closer i could understand, but 7 rds difference between 9 and 45 on that frame is pretty impressive. Think of basically having to reload or carry a spare mag to equal that 9mm capacity and no way is a mag full of 45 gonna be all hits.
sorry i rambled a little bit but just sharing my views on the situation. When it comes to guns like my XD, the XD45 holds 14rds where my xd9 holds 17, I can justify the 45 for my nightstand gun. But that Cougar has a big gap there!... 3 opposed to 7!!!!! thats amazing
