This may not help...but I have an XDm in 40 and a Glock 19. The XDm is new to me and less than 200 rounds down the pipe, so I'm still getting accustomed to it. But FWIW, I prefer the ergonomics of the glock. The xdm does "feel" narrower and smaller all around, I can more easily wrap my hand around it...but I still prefer the glock's grip.