Get both.....
I have both. A 1994 P226 in 9mm and a CZ75 Pre B.
I prefer to shoot the CZ. Just like on sweeper, it just fits my hands better and because I can`t hit a barn door with my Sig.......
My advice, since both are about equal quality, try both of them out on the range.
Asking 10 persons here will end in 10 different opinions on what to choose, because of the personal preference.
But in the end, no matter wich one you choose, both are fantastic firearms and for both, Sig and CZ you will find enough tuning and spare parts.