I have both, and VASTLY prefer the CZ. My favorite variant is the P-01. It's lighter and smaller than the Sig, yet is still more accurate (in my hands) and is easier to make quick follow-up shots with. The ergos on both guns are top notch.
As a Life member of SNM-Sons of Neanderthal Man-I shoot only steel frames.
Favorite ? I'll nominate my High Standard Victor since that's the one I learned to shoot with.
For steel framed autos it is the 1911 and the CZ 75B for me.
For all metal framed autos (to include aluminum alloy), I'd have to add the SIG P229 and alloy Commander sized (4" barrel) 1911s. Once I have some rounds through it, I strongly suspect my new CZ P01 will join the list.
I now actually own just 3, to my great surprise. Favorite to behold AND shoot: Witness Hunter (10mm). Favorite to hold, look at and dream of shooting more than 3 rounds thru without a malfunction: Smith Model 41.