CZ 75
I dont have experience with CZ 100. I haven't shot it, but it felt a bit awkward in my hand, after the CZ 75. It is a very flat pistol which some would fancy for concealed carry, after all it seems suitable for that.
I have shot and regularly carried a CZ 75 B as my personal concealed carry weapon, and I now say it is one of the best pistols you can ever get your hands on, also on a very reasonable price without compromise of quality.
CZ 75 I purchased had a very nice trigger out of the box, and I find it very accurate at ranges about 50 meters almost, 50 yards. This is not a distance for combat shooting of course, but you never know if you would ever engage targets that far.
Though it is a double action pistol, I always cock the hammer before I shoot to get the best accuracy. This is a very good pistol if you are in need of double taps since it stays on the target.
I would suggest buying a standard one instead of a compact, since their size really doesn't differ that much and the line of sight would be shorter in the compact, as well as two less rounds..
I would go for Glock for a polymer gun, but for classical choice CZ 75 is a real wonder nine.