I don't have any experience at all with a breast plate, so I won't comment about that aspect.
I do have a comment about the devastator vest.
I bought one the week they came out, along with many other people looking for a good protective vest, with minimal weight.
One of mine has been on hundreds of hogs, many good boar hogs, and not one puncture through it. I liked it so much, I bought a spare one from Joshua White when he decided to start running breast plates. Then over a year later, I bought another one for Mandi's dog Tater. Now, I use my dogs as lead in catch dogs, so I don't worry too much about how the can run and travel for extended durations. My dogs can load in the truck or mule with the vest on, that's about the extent of my mobility testing
All that said, a friend of mine bought one at the same time, and his was cut through on one of the very first hogs he ever got on with the new vest.
Two different people, same vest, and two vastly different opinions of the vest. I will recommend the devastator to anyone looking for a vest. I bet my friend would say they are junk.
I assume that two people could have similar experiences with any vest or breast plate. Just have to read plenty of reviews, and take a gamble.
