How loud is the Talon ss and the co2 version really….

compared to a 1377 or shrouded 2240. I want the .22 co2 version and then I’ll get the hpa later. But I’m not sure I wanted a $600 co2 setup if I decide co2 is sufficient for my needs. (I’m getting a bushnell legend if I get the talon ss) It has to be quiet. I will have the power turned down on hpa and up on co2. Thanks.