That's why I love them, you nailed it. Rest Pause Sets are simple and brutal, they don't require me to think, just lift. That's why I love them. Really easy to keep track. I write down my three numbers per set between each pause. Or I aim for 12-20 total reps, no matter how many pauses I need. Lots of ways to play with it.
I am not really good with the terminology. I always thought that Dr. Scotts' Muscle Rounds and DC's Sets, or things like Widowmakers are also Rest-Pause Work, just refining it a bit more.