You know, the other thing about the XDm? Whatever they did to improve the XD trigger, they should have done more of it. You can get a GLOCK trigger to be pretty good (out of the box they both stink).
If out of the box they both stink, then that's a wash. Or maybe not. There are several companies making drop-in trigger kits for the xD and xDM that are said to be "tuned 1911 good". I've got an overtravel stop coming in the mail for mine right now (hey, it was cheap) but I'm not sure I'll even bother. While, when sitting around dryfiring the xDM has a somewhat springy trigger feel with a tad too much reset, when shooting it in a competition setting, I've yet to notice it at all. The most "ultimate match super uber competeition match" trigger kit I've seen for an xD only runs about $90 and can be installed on your kitchen table. Like I said though, I'm not really feeling the need with mine.
Of course, I did just finish spending a year shooting nothing but revolver in competition so maybe my trigger finger is a little insensitive to the subtle differences.
I don't like grip safeties--seen too many guys miss the grip a little and stand there with the gun up and their thumbs in a place that only their proctologist will ever see, wondering why the gun won't fire.
I've wondered about that, having never missed my 1911's grip safety ONCE, but on the xD I cannot see how you could miss deactivating the grip safety if you have any kind of a firing grip on the gun at all. Just doesn't seem possible... Of course, every shooter will find his own ways to screw up, so I can't say it's impossible.
In the end, feel, grip angle, trigger quality, bore axis height, and all the rest pales in comparison to the major question: Which gun puts holes in the A zone of a target fastest in your hands? If you can figure that out, I'd get that one!
-Sam