CZ is a different company as Tau.
Tau is Tau Brno, and they have an different range of guns and stuff than CZ.
The Tau 200 is a Tau product as far as I know, and not CZ.
Allthough many czech companies have links to eachother, have been 1 company once and/or use each others stuff/designs.
Like AlfaProj and Tau. They are quite similar.