I wouldn't say it's "better" but here goes.

The dissipator is a clone of the Colt 605 rifle

The Colt 605 intent was to take the M16 and just cut the barrel down to 15" for maneuverability.

However, a rifle length gas system, didn't work with such a short barrel, and caused tons of issues. (Civilian legal length is 16", but same issues)

So the rifle never made it to modern production for military.

However, Bushmaster started making them years later, 16", rifle length handguards, but hidden under the handguard was a carbine gas system, so it worked fine. However it was fake (faux dissy) because it was actually a hidden carbine gas system. The LA bank robbers used these.

So, come along Anderson, DPMS and Winham Armory actually figured out how to make a 16' barrel with rifle length gas work correctly with any ammo.

However, places like PSA started just doing their own faux dissy which is a mid length gas, which is a very smooth shooter, but not as smooth as rifle.

Mid let's you run anything, suppressed, unsupressed, a2 stock, m4 stock, never will you have an issue in theory.

However, if you want the true real thing, that works that only anyone will know is the true real thing, you need the Anderson, dpms or Windham, all three of them don't make them anymore.

If you do run a real one, you want an a2 fixed stock though just so it's as light and gentle recoil as possible.

In theory having a gunsmith cut it down to the correct 15" barrel, or running a suppressor could cause it to not run reliable.

So tldr: if you want clone correct and smoothest possible shooting, and plan to run a fixed rifle stock and leave it at a 16" barrel Anderson, if you don't care, PSA.