Most people will buy based off of cost and weight rather than sound. In round numbers, no one knows what 70dB means relative to 64dB. But everyone knows what $3

Most people will buy based off of cost and weight rather than sound. In round numbers, no one knows what 70dB means relative to 64dB. But everyone knows what $30 or 3 extra pounds means. (Except for the majority of the world which doesn’t used $ or pounds of course), and bonus addendum, 70dB sounds about 50% louder than 64dB.