Because, as I originally said, the R9S is NOT rated for +P ammo (even has a warning on the magazine not to use +P ammo) while the 342 IS rated for +P ammo (says so right on the barrel).
I was under the impression that I would be better armed with seven rounds of non-+P 9mm than five rounds of +P .38 Special and juust wanted to see if others felt the same way.
I'm no expert, but I certainly wouldn't be concerned about putting +P into my R9s for defensive purposes. Mind you I wouldn't go around shooting it all day, but certainly not a problem for my defensive rounds. SIG doesn't authorize shooting +P+, but I know alot of people who use it with no problems.
As to your original question, I would personally prefer the R9s over the .38.
I was under the impression that I would be better armed with seven rounds of non-+P 9mm than five rounds of +P .38 Special and juust wanted to see if others felt the same way.
I'm no expert, but I certainly wouldn't be concerned about putting +P into my R9s for defensive purposes. Mind you I wouldn't go around shooting it all day, but certainly not a problem for my defensive rounds. SIG doesn't authorize shooting +P+, but I know alot of people who use it with no problems.
As to your original question, I would personally prefer the R9s over the .38.