I've got a Keltec 3AT and a PM9. I got the 3AT first and carried it in a Nemesis in the front pocket and loved it. Then I thought I needed more firepower so I got a PM9 and a Nemesis and tried to do the same thing. It didn't work for me so well.
I love my PM9, don't get me wrong, but for me it is better as an inside the waistband gun. Maybe the 3AT's light weight and size spoiled me, I don't know. The PM9 can be front pocket carried, but the weight is a little more than I like, and in some pants the bulge is more than I like. It does *okay* in big pocket cargo-type shorts or pants, but in dockers or jeans I much prefer the 3AT.
For pocket carry there is nothing as easily carried as the 3AT, so the PM9 you will notice more. It may work for you, but it will depend on your pockets/pants and your sensitivity for weight in your pocket.
I now carry my PM9 in a Highnoon Hidden Ally IWB when I want more power, but generally, just slip the KelTec in my pocket and the PM9 stays at home or in the truck.