the screen on the preserver is better IMHO compared to the lifeproof. The sensitivity is better for the preserve than lifeproof as the preserver sits just about perfectly flush to the screen, where the lifeproof is raised ever so slightly. I kept getting the newton rings on my lifeproof, though an anti glare screen protecter attached to the phone stopped most of that. Audio sounds better from the preserver also.
The touch ID works well on both phones, I prefer the membrane that covers the lifeproof home button to the one that covers the preserver but not enough to keep me from returning the lifeproof. Also the headphones I use can't go into the lifeproof with the adapter but they can go into the preserver. I'll post some pics here in a few