With your vast experience, I think you will find them a dream to carry.

The 642 is a great coat pocket winter gun and so light and enjoyable in the summer.

I think the slighly heavier frame is my sweet spot for enjoyable shooting, so for me the 640 as a shooter.

Splitting hairs... really.

That said, I'm almost went out and got another Glock 26/27 because I shoot them far better and have a nagging doubt about being undergunned capacity-wise.