I know you didn't directly ask about this, but since they fill similar roles, I figured I'd chime in here just in case you might be interested but hadn't thought of this.
I've found that my Rossi M92 16"bbl in .38/.357 is really quiet when shooting .38's and recoils very lightly.
Some people say that a lot of the noise with a 9mm carbine comes from the opening of the blowback while there is still pressure in the chamber/barrel. No worries about that with a lever action, as YOU are the one who decides when that chamber opens up.
.38spl is also a much lower pressure round than a 9mm, so there is less pressure and lower noise in the first place. The advantage, aside from noise, is that you get the versatility of being able to load full power .357mag loads in the lever gun, and end up with ballistics that are right on the edge of .30-30 performance, something that the heaviest 9mm could never even dream about. Of course, there is a noise penalty for that, but hey, you don't get nuttin' fer nuttin'. And, of course, rate of fire/reload is going to be lower in the levergun than in the semi-auto, if that really matters in any practical sense.
Just my $0.02