I think either one would work fine for both cases, predators and Zombies..
I was out last weekend and set out some left over paint cans filled with water, and shot them at 100yrds
1. Shot one with a FMJ, nothing happened, the bullet went right through and it just jumped a little and tipped over.
2. Used a V-max bullet, the can flew into the air about 20 feet and completely ripped apart.
3. Zmax bullet did about the same thing.
Lesson learned, if you want to transfer energy and put a hurtin on something you are shooting, use the balistic tip bullets.
I just wish i had them in Afghanistan.