I own both. I have a Glock 21 and a 1911.
Things that are true of the Glock:
1. It worked right out of the box.
2. It has worked every time I used it.
3. It is reasonably accurate.
4. It requires little maintenance or cleaning. The finish on the slide seems to be rustproof. The polymer frame is rustproof.
5. The normal magazines hold 13 rounds.
Things that are true of the 1911:
1. It required work to make it reliable.
2. Since that work was done, it has worked every time I used it.
3. It is very accurate.
4. The blued slide will show rust easily. I’m probably going to have the slide refinished in something more protective.
5. I clean it after every match.
6. It has 8 round magazines.
Those objective facts do not begin to describe the difference I personally feel. Like the difference between a modern sedan and an old pickup truck, it is hard to explain why I would choose the truck. Both get you there, both work. Plenty of people make the other choice and I’m okay with that.
But I’m at home in an old truck. And it’s more satisfying to be shooting a 1911.