I have an xd-9 in four inch, and have used friends four and five inch in .45. Absolutely love mine, and can't say that theirs are any different outside of the recoil. Only reason I bought the 9mm is that I have a 1911, 2011 and revolver all in .45acp, a nice .40s&w, and didn't have any 9mm. The only thing I would suggest is check if you like the thicker grip on the .45. I have large hands, but am so used to the 1911 and my heavily comped 2011, that the thicker grip didn't feel good with the heavier recoil.