I have 2 TT-33s, and I have owned 4 CZ-52s. I only have one of those now.
Get either one. Both are fantastic guns to shoot and both will cause heads to turn at the range.
Pros CZ-52: Inexpensive, unique operating system (NOT based on the Browning design), easy to field strip, nice feel.
Cons CZ-52: Ergonomics (totally subjective here), brittle firing fin (NOT a problem if you don't dryfire), decockers tend to be warn.
Pros TT-33: Inexpensive, easy to field strip (minus the bushing), hammer group can be removed for easier cleaning, Simple to operate.
Cons TT-33: Ergonomics (totally subjective here), no manual safety (one that is on the Romanian imports is BATF mandated for import).
Prices on both and on surplus ammo represent one of the last true C&R deals out there right now. Where else can you walk away with a handgun and 1200 rounds of ammo for under 400 bucks right now?