Considering you own it, might as well see if you like the 9c as a carry gun. With the right holster and clothing choice, I'm sure you will be able to carry it just fine. That aspect of the two guns is purely a personal opinion. As for your actual original question (accuracy, recoil): accuracy is again based primarily on the person, especially since at SD distances and scenarios the bit of a difference in barrel length wont make too much of a difference. I have read that people are fond of the dual spring in the Shield as it reduces recoil well.

On the round count issue: 1911's, the "gold standard" of guns, often have a 7+1 capacity... seems like there are a good amount of people who think that is plenty given it's popularity and that there are many who will carry a 1911 and nothing else.