I think they are both similar.
Glenn started the DSR way before Triton came on the market.
Triton is readily available to purchase IMO.
But then again it's like you ask what the difference between ZEO or Aqua Forest method?
You get the same results at the end.
DSR is about empowering and inspiring the reefers by doing the essentials needed to run a reef without waterchanges.
It's about gaining control without depending to much on advice given by others, but by learning to do things yourself, guided by kindred spirits.
We don't seek to mimic NSW and follow fixed rules, but try to learn and optimize how we can push boundaries and have great result at the same time.
This tank is since 2004 without waterchanges .
Since 2012 it's on autopilot and did great