because they are not even close to the same, for the reasons given.Just for the sake of completeness, why IS comparing a suppressor to a muffler "apples and oranges"? If you get nitpicky enough, EVERYTHING is "apples and oranges".
does your engine run on smokeless powder, with chamber pressures of 60,000 psi and combustion temperatures of 1400F? is the exhaust violent enough to erode iconel and vaporize lead?
comparing an automotive muffler to a firearm suppressor is more like comparing a baseball and a jellyfish.