[testuser]

I'd say.

The M&Pc:

Pro: Dimensionally a little more efficient.

+2 rounds in a pistol that's .3 of an inch shorter than the SR9c.
Overall length is slight shorter, despite having the same barrel length.

Con: Seems like it has a higher bore axis.

SR9c.

Pro: Tends to fit people will slimmer hands better. Some like the trigger better. (Then again, a longer trigger pull lends itself to safer carry without a safety.)

Con: A manual safety on a gun with a trigger type than doesn't require one. This could accidentally be left on.

M&P has an optional thumb safety that can easily be removed by the end user if no longer desired. I've done this before, just drive out a few pins and lift out the safety.