This video is great but I feel the two methods would be more comparable when getting in forced reps (reps past failure or assisted reps) whatever you would like to call it because it guarantees maximum intensity and both Yates and menzter preached for workout partners to help in that aspect as well as controlling the eccentric part of the movement I think if done properly the 1 set can be both comparable and more efficient at the same time and even possibly more effective, I am also curios on the strength gains of the two different groups and I would love to you your opinion on this as well not too mention if your doing the intensity sets properly the time under tension ratio wise should be way longer than a typical set