I think you will find that they used to be one and the same, but then due to some upset or the other, I can't recall if it was political or not, the company split. So one company became two. So although not the same company, I don't think there will be too much difference between them. That is a real potted version of events.
For what it is worth I have three CZ's and two BRNO's and like them all, maybe not fashionable and sexy, neither am I come to that, but reliable and accurate.
John