drop resistance

Unfortunately, @Dannydet is correct. Any case has a margin of risk, but it's better than no case at all. All three will provide some drop protection, assuming the drop is relatively low and the phone lands in such a way that the case can absorb the shock. Drop a phone from 6' or higher and you're out of luck most of the time.

That said, I'd probably go for the olixiar only because i believe that the "built in screen guard" on the i-blason would be nothing but trouble. The ESR is just a basic thin case.

 

DO you have a habit of dropping phones? There are some cases that will protect a phone a little better than others, but they are bulky, ugly and make it very inconvenient to use and pocket your phone. You cold also get a case with a place to connect a lanyard so you can wear it around your neck or hook to a belt.