applications - What's the difference between the various lost phone apps?

I want to get a security app for my phone. I mostly need something in case my phone gets lost or stolen.

Researching this I have found several apps:

I am sure there are more out there too.

My question is why would I choose one of these over the others. How do they differ? Does anyone have experience with wiping or finding a lost phone using one of these devices?

Thanks!