Experience
All of us base what we say on our experiences. Of course YMWV, but in my expecerience I've never had a single problem with a SIG Sauer. Up until a few months ago I could've said the same thing about CZ, not anymore. I had a CZ75 POS that would do cute little things like have the safety fly off the frame, jam on every other round, and generally act up worse than any pistol I've ever owned. Based on my experience I'd say go with a SIG Sauer. I'm still waiting for a SIG Sauer to choke or jam in my hands.