I have PUB, PLB, PS and S&H. I haven't yet done Slow and Heavy. PS doesn't have the pyramids that PUB/PLB has, but in terms of number of reps, speed of reps and rest between sets, PUB/PLB are probably more similar to PS than to S&H. Slow and Heavy is just what it says. One point that may be of interest: Cathe says in the intro to S&H that you might actually have to go lighter than normal, because of how slow your lifting and the fact that momentum is completely removed from the process. I didn't respond to your question comparing PUB/PLB and S&H, and somebody else may have said this on that thread: PUB/PLB have great stability ball work in them that is not in either PS or S&H. As I said, I haven't done S&H, so I can't give any personal insight on it. I hope that helps some anyway!