I've never used a Rooster Booster Nomadz so I can't compare, but I have run a SteelPhase sP01 on my last couple of expeditions. I found some lead about 8" or 10" down in ground so hard I got excited realizing that the ground had either never been dug or not dug for a long, long time. Before I dug it out I tried the signal response without the sP01, and then with the sP01 on positions 1, 2, and then 3 (I came across the signal using the sP01 set on 3). It liked position 3 so much so that the signal stood out clearly. I could still hear it without the sP01, but there was a lot more background noise along with it. I guess if it had have been a smaller and/or deeper target that may have been the difference between hearing it with the sP01 or not hearing it at all.