I've had both, and the Shield is the best of the two, IMO. In fact, when the Shield came out, I sold my LC9 and bought a Shield in 9mm. My wife won't part with her LC9, though...it's the TALO Gold model, and she thinks it's "pretty." She also can rack the slide on it easily, which she can't do on most other pistols, including the Shield. The trigger on the Shield is much better. I also like it that I can take the striker out of the Shield without knocking out pins, etc. I like to clean out the striker channel on occasion, and both the field strip and slide detail strip are easier to do on the Shield. Field stripping a LC9 isn't hard, but I don't like it that the take down pin isn't retained in the pistol. It's small and says "lose me" on it. (I ordered a few spares, just in case.)

Both companies have great service, so it's hard to go wrong with either choice. For my money, the Shield is the better choice.