The only real differences between the two is as you noted - reduced magazine capacity, and barrel leingth. Since the more compact model feels good in your hand, that is what I would choose, as there is no practical difference in accuracy or control between the two, and it will conceal a little easier. Although a little on the "thick" side, most guys have no problems using a good inside the waist band holster. For open carry on your belt, the Kydex paddle holsters work well. Take what you sometimes hear about Glocks with a grain of salt. They are by far the most popular police issue weapon in the country, and there is a reason for it. They just plain work. I have one of the first model 19's imported, and have been trying as hard as I can to break it these past 25 or so years with many thousands of Govt. supplied rounds. No luck so far, and my G26, with a lot less rounds thru it is just as reliable, and accurate.
Larry