i own both (CZ75 model 2 and Sig Sauer 266R, german made), beside the coin only REAL differences' are personal opinion and CZ can be cocked and locked
both guns will out do ANY person's natural ability to shoot for accuracy wise
i feel cz is a little heavier and a TAD smaller, but a prefer a heavy gun as i have weaighted my sig as well
the way i have set my guns up i can and have out shot dedicated 1911 race guns, how? i dunno maybe user error or rig setups
+ is that my cz has almost 50 000 rounds (note:change main spring every 5000ish rounds

) through her and only one broke extractor and one worn out main spring and MAYBE 5 stoppages outside of the competition that my extractor broke, sig only has 500ish round through her with 0 stoppages
personal opinion: is go to your local range and ask to try one of each and make your decision from there, again it comes to your preference and what you can afford
training will negate the small nuisances such as gripping the CZ slide or the Sig DA trigger