How much does this quite the Origin compared to stock?
Sorry but I do not have a laboratory with certified sound pressure meters to quantify the sound reduction but you will definitely hear a difference.
The main thing you will notice right away is the tone of the shot is lower and less reverberating.
As a reminder, baffles and air strippers do more for the airstream than just reduce sound, they reduce turbulence as well.
Less turbulence results in a smoother launch of the projectile from the muzzle.