Apples vs Oranges.
One is DA/SA the other is striker fired.
Can't really compare them directly due to that alone, because action type differences are pretty significant... although I'm sure the M+P 9c is better
suited for CCW, due to weight alone. The M+P has lower bore axis, which (generally) means less muzzle flip. The P239s are very flippy guns, especially once you get above 9mm. Not so bad with a better set of grips on them.. first order of business is to dump the soap bars that come on
it.
If I was forced into a choice between the two I'd probably choose the P239, but only because of familiarity. (I owned one for several years, never a problem with it). Admittedly, though, the 9c is probably going to be an easier carry due to weight...
In my case I wasn't stuck with 2 choices, so I sold the P239 and got (another) G19.. and that's all she wrote. Not much bigger and almost double the
capacity.
-Mike