I like the xdm personally, though to be honest I have only shot a few glocks. I like the interchangeable backs traps for ergonomics. It has a grip safety the glocks don't have, it also has a chamber indicator if you have one in the pipe you can visually see and can feel if it is dark out. The glocks have a crisp trigger when it breaks compared to my xdm, though I like the feel of the trigger reset on the xdm makes for quick follow up shots.