I have compared both and the Ruger trigger is different
The Ruger gives you a much bigger trigger guard and a slightly different trigger. The Keltec trigger guard is small.
Keltec gives you more checkering and that checkering is sharper and more aggressive. The Ruger gives you a thumgroove on the grip.
If you have a big hand, go with the Ruger. If you are a Woman or have a small hand, use the Keltec.
Personally, I believe the Ruger is just a little bit more rugged, but not by much.
I have been shooting my Ruger LCP. Following a standard 5 yard to 25 yard qualification course, it works just fine. I was very surprised how such a small pistol puts the bullets on target almost just like a big holster-pistol. I am definitely glad I went with the Ruger. Out of a 500 round string, I had no stoppages, no jambs. It cleaned up very easily. I think I am going to keep this one. I am aware that others have had some stoppages with the earlier runs in this model. Mine is a late run, and was purchased new from a gunshop in the Dallas area. It has been a very handy carry-pistol. I can certainly reccommend one.