MTS, Other than the disconnect issue, all 5946 are (as you stated) the same. Smith only removes the disconnect feature on LE guns, ours being one of the agency's that have...or don't have the feature.
If you went into a dealer (not distributor) and wanted the gun, they would sell you one that has the feature, cannot be fired (last round) if the Mag is removed.
Hey, I know our job and some others still use the gun and Smith still makes it for us/them, but is it still a cataloged item?