Gruesome title eh? Just a little side by side of the decay from 3 Behringer monitors.
Note the 1030A has the most reflection showing followed by the 2031P with cotton and the 2031P without cotton being the cleanest. So as you go lower in frequency and the dispersion gets more broad, the accuracy will be less precise for the graph with cotton and even more so for the 1030A. Also notice that the 1030A will get more reflections in the graph d/t its wider dispersion until the top octave.