Powermaster is genrally more money but in some tests that ive read they appear to be a much better battery, i have limited testing with the 2400 kinetic against a powermaster but i did test one against a stinger 2150 and just a battery swap the stinger produced 1 db more of output, the system was 2 12 and 2 hifonics goliaths. i dont have any more info other than that