I've never been a Gluck guy or an XD "Grip Zone" guy, but in 10mm, I have settled on the XDM/XDME platform over the G20/G40 platform because of the superior OOB trigger, better sights and excellent grip angle that allows for a very good and natural POA for me. I think all the on-board nannys of the XD line are off-putting. LCI, striker indicator, trigger dingus, grip safety, come on man! ENOUGH! However, most other 10mm semi-auto polymer firearms have proven to have ongoing reliability issues, none of which have materialized in the main in the XDMs and Glucks. So of the two, I'll stick with my XDMs. The similarities I describe in my 10mms are applicable to the 9mm comparison as well.