This is a question I've had to field several times. I wasn't quite sure how to answer so I looked it up. Here's a pretty good one-stop explanation.
So, what's my take? If you are not a gamer and you want to follow the K.I.S.S. principle AND use a .30 in your AR the Blackout/Whisper is the way to go. Minimal modifications, minimal problem getting ammo, minimal problems making brass (if you have to in the future) all speak in favor of the Blackout/Whisper round. No, it doesn't generate the horsepower of the Wilson round but for what MOST of us do, that isn't necessary.