My reason for the choice was cost.

I wanted an M&P 340. I ended up with a 442 Pro. It was on sale, plus at the time S&W had a $50 rebate for Mil and LEO. I think with the rebate it was just under $300 when I bought it. I could have bought 2 for the price of an M&P 340.

It turns out I like it. Out of the box, the front sight needs help. Paint it easy, but the M&P 340 and the 340 PD give you pretty good front sight options.

I have found I really like the moon clips for extraction. The trigger on mine was very smooth.

Because I would have likely been using the same short barrel +Ps, I could not justify the more expensive option at the time. I still want the M&P.