Those are nice guns. I have one of them and a non rail early 3913TSW. I carry that one most of the time unless I'm carrying my CS9.
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Looks like you stippled the grips on the one in the back??? Seven round mag???
I've found the railed 39xxTSW pistols to be the most accurate of all of my S&W 3rd Gen production guns, including examples in the full-size 9/40/45 TSW series. My pre-rail 3913TSW has the best overall trigger though, and that's something I've noticed on other examples as well.