Going to purchase a carry gun here soon. Looking at the xdm 3.8 compact but not sure what exactly is the difference between the full size and the compact. Is the compact frame smaller? I know it takes a 13 round magazine so the handle is shorter, but is that the only difference? Is the slide more narrow? Please let me know and sorry if this has been discussed before. I looked on the xd website but didn't really see the answers I'm looking for. Thanks.