I have the NL version of the 3913 (Non Ladysmith). Exactly the same as a Ladysmith, down to the frame cuts, grips, but doesn't have "Ladysmith" slathered over the slide.
As I've never shot a regular framed 3913, I cannot compare. But I can say it's a very nice shooting compact 9mm.
I do think the grey grips look lame though. Seriously thinking of finding factory black, or just put hogue grips on it.
One thing I do not like about the pistol (and smith autos in general) is the mag disconnect. I suppose I can take it out, but I don't shoot it enough to make it worth my time.
Nice write-up http://www.thegunzone.com/3913nl.html