My first impression by the title of your thread, and using .9mm and .40mm is that you may well need to study, and learn more about firearms before you decide on either.
I definitely didn't type the subject correctly. I do have enough common sense to shoot both and see how I like them. It's a lot easier said than done finding a range in my area that has both guns to rent. So, I was hoping to get some good input from you guys.
BTW, do people usually fight so much on this forum?