I looked in the WP, it had a couple small bit of bone rolling around, I’ve noticed most tend to struggle with those smaller bits of hard material, I usually just let it deal with it over the next few uses. And yes, if you leave much of anything in there, it can easily jam up on that fixed impeller, then you have to reach in while it’s off and rotate the turntable backwards a little bit and it’ll usually start right up. But I do try and avoid that happening!
The Moen disposer is built like the WK on the left side of this sink, but the slightly smaller unit. I’ll be honest and say it probably performs just like the 1HP one in the video, even on larger and more challenging items like bones and rinds. I’ve also found the vintage style WK machines, the older 1/2 HP unit does just as well as the newer 3/4.