Twenty is a bit louder, but not a lot depending on cartridges. If you want to be as quiet as possible, your probably better off with the fourten. You can however, achieve fourten 3” performance and noise with a twenty hushpower by using Hull subsonic 20. They’re 23 gram and perform similarly to a magnum fourten load, probably a bit better. It just depends on your needs really, but the twenty will definitely offer superior performance overall, as you’d expect.