1. In the case of a self-defense pistol, rather than a bullseye-competition gun, adjustable sights are meaningless. Once zeroed (usually at the factory), a self-defense gun's sights are never changed. Also, adjustable sights are more fragile than fixed ones.
2. While it is possible that the Hi-Power is more lovely to look at, depending upon your taste (and I prefer blondes), its trigger is more difficult to adjust to achieve a light, crisp pull weight. Further, the Hi-Power has a magazine disconnecting device which drags against the magazine and thereby degrades its trigger action. The magazine disconnector keeps you from firing a last, save-your-life shot while changing magazines, which is impractical. (Does the CZ have one?)
3. Generally speaking, a gun which you find to be more comfortable will help you to shoot more accurately and effectively. If that comfortable gun comes with a built-in good trigger action, I would consider the choice to have already been made.
4. It's nice to have lots of shots. The Browning will hold 12+1, I believe. If the CZ holds more than that, it might be considered yet another advantage. (My EDC holds six, but I do quick reloads.)