The Big Vert plan ME progression moves up to more sets (e.g. 10×10 vs 8×10), and also drops the rests between sets down to 10 seconds. I find the rest between sets a big difference. 45 vs 30 vs 20 vs 10 seconds are big differences in how taxing tey are.
Also, it moves up to more rounds of all sets of exercises (e.g. 3 times through 10×10 of each exercise with 10 seconds between sets and 1 minute between rounds).