I wonder how much less comes out of the end of a can... Have you ever thought of doing something like that to show how much powder smoke a can will hide and obviously the no flash aspect? Would be nifty if it's in the cards for you to throw a form 4 on the end of the muzzle.
The difference is huge. Here's a Reflex silencer fitter to that same AR-15:
With any comp it looks like this:
Same load used in both pictures - Can you tell the difference
Reflex Suppressor for M16