There isn't a pistol event that A Glock or 1911 can't dominate. IDPA, 3 gun, etc. If you have a 1911 and a Glock your pretty much setup well for just about anything. The only time I'll carry anything other than a Glock or 1911 is deep concealment where a Kahr fits a bit better.
I own both. Some points I've noticed about this:
-Grip angle is a non-issue. The guns feel so different, as long as I'm mentally trying to get a good high tang grip and my thumbs forward I can switch back and forth with no problems. Both point well.
-A good 1911, even tight fitted slides with 0 play, is just as reliable as the Glock. If not more. At least under practical use. I don't throw 1911's out airplane windows or bury them.
-1911 has the best trigger of all pistols. Glock has an effective trigger that's easy to use, but feels as nice as the brakes on a Russian automobile.
-1911's generally need a few changes to fit the shooter. Like thumb safety, grip safety, mag release type, and grips. Glocks are allmost allways ready to go out of the box.
-Glocks have a good durable finish. 1911's need refinished to reach Glocks level of finish. Often $300+ for Melonite or Hardhat. But you can order DW and LB from Severns Custom Hardhatted and ready to go. So things are improving in the 1911 camp.
-1911's never come with good mags. Glocks allways come with good mags.
-Some 1911's come with good sights. Glocks allmost never come with good sights. Glocks are much easier to install new sights onto. 1911's may require a bit of research, and you may have to try a couple different front sight heights to get it perfect.
-A 5" 1911 is the easiest to conceal big fullsize gun. I usually carry a Glock 23 rather than a smaller 4" 1911. But I never carry a fullsize Glock. (17,22,21)
-1911's have a ton of redundant safeties. Even cocked and locked the 1911 is the safest CCW pistol out there.
Glocks go bang when the trigger is pulled, and don't go bang when you don't pull the trigger, no safeties needed, but it deos require a good quality holster and some tender care when reholstering.
-1911 is heavier. .40 caliber Glocks are lighter but have a snappy recoil.
-Both require proper maintenace, I don't care what the cool aid says. Both eat springs. Nom, Nom, Nom. Both should be properly lubed.
Both seem to attract newer shooters that are Super picky about reliability, but too ignorant to learn the simplest proper maintenace.
Noone complains more on the internet than a 1911 or Glock shooter that can't grasp the idea that certain parts/springs need a replacement schedule and that metal slides better when actually oiled.
-1911 costs three times more than a Glock. The 1911 was designed in an age where people were still craftsman. Don't expect a Glock priced 1911 to keep up with a Glock.
-Both come in black.