We have not done any specific comparisons between the SE Nighstick, but I would expect the PowerTube to test 2-3 dB louder. Also because the Nightstick does not actually have a conventional louvered or perforated core the PowerTube has a deeper, throatier tone with its stainless steel perforated core and Silent Sport exhaust packing. The PowerTube is one of my personal favorites as far as exhaust note. This is really a great sounding muffler