I’ve been carrying both for years and I think I’ve come to the conclusion that the 23 is actually more comfortable to carry. I think it has to do with the butt of the grip. With the 27 the butt of the grip is right at the side of my abdomen and with the 23 it comes up and out from my body. The side of the 23 grip touches but it’s smooth and flat. The butt of the 27 has all sorts of angled edges. Anyone else agree?