I own a CZ52 and have shot a number of TTs in both 7.62 and 9mm.
The TT is great gun. The magazines, sights, and ergo's of the TT are superior to the CZ. I also like the 1911ish disassembly and easily removed lock-work. The big down side to the TT is the safeties that were added on when they were imported can be a major problem.
I bought the CZ because I like the 50s ray-gun look. The ergonomics are a bit odd, but not unmanageable. The sights are a bit harder to use, but they help contribute to the CZ's fine accuracy. The firing-pins are brittle, but as long you don't dry-fire the pistol it is a non-issue. The fact that it has a factory safety/de-cocker is a definite plus, but as was mentioned the de-cocker can be a bit iffy. Follow the first rule and keep the gun in a safe direction. In my experience it is a minor issue and I have only seen the de-cocker issue on one really beat pistol.
If you are looking for a neat collector's piece then go for the CZ52. If you want a shooter then get the TT33.