This is really a kind of silly comparison. These two pistols are so far apart in practicalities it's crazy.
One's a modern hunk of plastic shooting a boring, commonly found round and parts. A working mans tool so to speak, that serves the masses well....The other a somewhat antiquated, milsurp hunk of steel shooting an eccentric, not so commonly found (fire breathing/ap) round. More of an unusual, novelty type tool but certainly capable of laying 'em down.
If you don't have a modern, CC type pistol, shooting a commonly found round like the 9mm, than you'll definitely want the G19. If you already have that covered, than why not treat yourself to something different, that when it goes
BANG, turns heads like most semi auto pistols can only dream of.
If you decide to go with a CZ-52 make sure you find a good sample. Like all milsurps, some have been beat to death and others hardly used. Preferably, look for a lightly used, original gray finish as compared to the been to hell and back re-arsenaled black finish.
I don't use my CZ-52 as a CC piece but I can assure you if the zombie apocalypse should ever rear its ugly head, the 52 will be the first sidearm attached to my belt.