Akodo1, what Country said was of course correct, but a LOT of research went into CGW's race hammer.
I'm no gunsmith, but the fit, weight, design, finish and high quality steel were designed to not only give the optimum hammer strike but we're also designed to "last".
On a stock DA/SA hammer, watch the hammer move " back" as the trigger pull starts. Then feel the creep as you get closer to the drop after a long pull. All this has been minimised or removed. The SA actually can be close to the same as a quality 1911 trigger.
I believe an improved hammer is the single biggest action improvement available for the CZ 75 DA/SA pistols.