if you look at the frames minus the grips, yes, the frame of the 1911 is narrower then the CZ. however, depending on grips on each gun, the 1911 could be wider then the CZ. I have Hogue grippers on one of my CZs and Pachymr Signatures on one of my 1911. with those grips on each of the guns, they are identical in width. but, the shapes are different.
a note about 1911 in 9mm. look for a used Colt 1991A1. im not sure of current prices, but i got one in '06 for $600.00 . It was/is LNIB too and is the reason i got it. it has the black phospate finish and i think they arent as desireable as the blued versions. There are other 1911 9mm out there, but you just have to keep an eye peeled.
the CZs are available in different flavors: SA/DA, SA, DAO (discontinued but i see the 40 version is back)
Yes the DA will be long, but ive never handled/shot one that wasnt. The SA in the DA/SA will have some takeup, again, ive never handled/shot one that didnt. If you want a SA, they will have the shorter pull. The standard sights is what i call faux night sight , 3- dot. i think they are glow in the dark paint. you can get aftermarket sights for the CZ if you want.
with respect to mags, there are the OEMs and then the MecGars. I use/have alot of MecGars and find they are well made and work.
one comment. if you get the CZ, you can also get the Kadet conversion kit upper in 22LR for it too. sort of an added bonus since some platforms dont have that option.
if you can, i would look for some toys to try either at a gun store/show or a gun rental range.
