I have had my hands on both but not actually fired the guns. My mind keeps saying go with the Smith, but that's probably because I really like my Shield 9mm a lot. The Smith is about 3-4 ounces lighter and it does come with two mags.
I am going to purchase one of these two guns for when I'm out and about, camping, and to just keep in my truck/home. I already have a Shield 9mm that gets used as my edc. I like that both have 4" barrels and high capacity round count. Plus, both seem to get good reviews and the price is hard to beat on both guns. So if anyone has any experience with either gun, good or bad, please feel free to share. Thanks and God Bless