I own variants of the guns you listed.
My STI Spartan 1911 in .45 is simply a pleasure to shoot. I often take it with me to 3-gun matches simply because I enjoy shooting it so much, despite its disadvantages in 3-gun. However, it is the least reliable centerfire pistol I own. It is somewhat picky about mags, bullet shape, and cartridge length.
My CZ SP-01 is 75B variant. Compared to a standard 75B, the SP-01 is slightly longer and has a full length dust cover with picatinny rail. It also comes standard with night sights and 18rd mags (but it will happily accept standard 75B 16rd mags). It is all steel and recoil is practically nil, especially with a light mounted to the rail. Mine is manual safety model, but a decocker version is also available. Despite being a full size gun, the grip is very comfortable, even with my small hands. The safety is an a bad spot for my short thumbs (the 1911 safety is much better in that regard).
The SP-01 trigger has a slightly different curve than the 75B does, and I vbbelieve the grip is just a smidge different. That said, most people find the grips of both to be quite nice. VZ and CZ Custom offer custom grip panels.
I have two 9mm Glocks, the baby 26 and the extended-length 34 (about 1/2" longer slide than the 17). They are incredibly reliable. Pretty much any/every part of them can be changed out for an aftermarket part, if you are inclined to do so. My 26 is stock aside from Meprolight night sights and a Glock extended slide release. My 34 is set up for games, but is far from a race gun. It has Warren Tactical "Sevigny Carry" sights, Glock extended mag release, Glock extended slide release, "match grade" slide lock, Ghost Rocket connector, Seattle Slug, steel guide rod, and reduced power recoil spring.
The two biggest drawbacks to the Glock are the grip shape and the trigger. The grip is large, even on the Gen4 models, and the angle is a bit odd. But if you find it comfortable, no big deal. If you hate the grip shape, the rest of the gun doesn't matter. The trigger, to put it nicely, is mediocre, especially if you like single-actions like the 1911. One thing I've learned is that a Glock trigger will never feel like a 1911 trigger. And that's fine - there are plenty of USPSA and 3-gun shooters that shoot exceedingly well with the Glock.
Glocks are incredibly simple to work on. My SP-01 is like a swiss watch compared to the sun dial mechanism of the Glock. Spare parts are also incredibly cheap and easy to find for Glocks. Glocks can also be found for $350-$400 for used Gen2 and Gen3 guns, usually police trade-ins. If you buy a used gun, you can replace pretty much every spring in it for about $20 and basically have a near-new gun.
In action, the large slide of the Glock is much easier to manipulate than the comparatively small slide of the CZ. The consistent trigger of the Glock and 1911 are seen by some as better than the DA/SA of the CZ. As mentioned, I don't care for the safety location on the CZ. My first shot times are faster with the 1911 compared to the CZ, but a 17 shot string is faster with the CZ since I won't have to reload while I'll have to reload twice with the 1911. Grounding the Glock during a match is easier than the other two since there is no safety to flip on. The Glock 34 also carries easier than my 1911 or SP-01 due to the weight.
In short, they are three different guns. Not vastly different, but enough that you can see why people have preferences.
My wife prefers the SP-01 because of the grip and minimal recoil.
For pure shooting fun, I prefer the 1911.
For a match, I prefer the Glock.
For the nightstand, the SP-01 is ready.
If I had to take a pistol to fight zombie hordes in a post-apocalyptic world, I'd take the Glock.
Regarding reliability, there are plenty of youtube torture tests for you to watch and Glock reliability is real. I will say that at matches, by far, the least reliable handgun I see is the 1911. Only pump shotguns fare worse in the reliability department.
If you do get a Glock, try the various lengths. Some people shoot the 17 better than the 34, despite the longer sight radius of the 17. Some prefer the recoil impulse of the 189 over the 17. The all feel similar and shoot similar, but are certainly different. All of them have mild recoil. The baby 26 gets jumpy because of the short grip.
