The original SSS was a pretty faithful copy of the Alessi CQC/S and held the gun pretty close to the body.
The Gen2 added reinforcement around the mouth, which I really like, but then they reduced the cant of the holster which negates the original intent of balancing butt heavy guns. I don't see the changes as positively affecting the holsters ability to conceal a heavy pistol.
How tightly it would carry a gun to the body will be somewhat dependent on the length of the slide and butt