What is the pro and con of each of these tremolo system?
The two bridges in question is Ibanez SAT PRO (or Wilkinson) versus Ibanez Zero Resistant ZR.

ESP Standard Eclipse I CTM VW
ESP LTD Deluxe H-1001
ESP LTD Deluxe Viper-1000 STBC
ESP Edwards E-EX-100STD
Warmoth Paulcaster "Tiger"
Tanglewood TW170 AS
Vox Tonelab ST
Blackstar HT-1R

Wilkinsons cant bend as far, and dont float most of the time, altho they can if they are set up right. Ibanez ZRs are very smooth, can bend up a few steps, and I think you can lock the arm in place to make things easier.
the zr is really nice and solid. u can do some really cool tricks and stuff with it but the only con really is its more complicated to change the strings and you have to unscrew the nut at the top when you tune it but it only takes like an extra 10 seconds to unscrew it.