Go to a gun store & fondle both of them, along with others. With the adjustable grips, I’m sure you will choose the M&P9c. In fact, I’m sure it will bring a smile to your face. It is very accurate IMHO. I used my 9c when I qualified for my CHL, and the instructor told me that this handgun suites me. I was shooting respectable groups at 7 yds, and that was after having it a few weeks. Had a M&P 9 full size but I sold it to fund another buy. I dispatched a groundhog with it from roughly 20 yds. Found that I was just as accurate with the 9c.

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Inconsistently consistent