In the videos they are the same, but Pendlay Rows and Barbell Rows are a little bit diferent. In Pendlay Rows you don’t have eccentric. In Barbell Rows you have.
Rip and Nim’s demonstration gives me the impression they pull the bar off the floor like DL, just explosively, probably with rounded upper back, then let the check meet the bar. The weight on the bar has little to nothing to do how hard your back can contract but how much weight you can pull off the floor explosively. Just like on that video’s comment section, someone said something like ‘how to avoid using your back on barbell row’
I believe Andy and even Reynolds’ suggestion is to grab the bar with a ‘soft’ upper back, and flex your upper back as hard as possible, pull all slack off the bar, even make the bar left the floor when using lighter weight. My upper back was on fire when do sets of 10s with this method.
Even in barbell logic podcast Reynolds said we should watch Rip’s video, but I just cannot see the resemblance of this two method.