Although I'm tempted to get a LCP, I can't think of any advantages that it may have over my faithful Kel Tec P380. Especially since the Rugers are in the "teething" stage. I would personally wait a bit more until the bugs iron out of the Rugers.
As for the Keltec, I've had mixed experiences.
My .380 worked right out of the box with no problems whatsoever. My current carry load is the Speer Gold Dot 90gr JHP. The finish is parkerized and durable. I couldn't be happier.
The P32 , .32 auto was a totally different story. The first day the blue finish rusted when I left it in a damp holster. On the first range trip the magazine release spring fell out, along with the mag release. It would stovepipe with no specific pattern. Could I have sent it back to Kel Tec and have it fixed? Of course, but I personally think it was jinxed, so I sold it to a buyer with full disclosure of the problems.
Both would be a good choice and I don't think there is much of a difference between the two operating systems. The trick is finding one that works 100 percent for you. You are already disadvantaged by a smaller caliber mouse gun, so you need it to go bang every time.