I hoping you’re talking about live capture here. Otherwise if you’re capturing off the Z1 tape(read mpeg2 compressed here), then the advantages of using BMD kit would only be similar to using another intermediate codec i.e. cineform aspect, which is reportedly meant to be more robust when it comes to putting in effects, colour correction etc on the ‘HDV’ footage.
You hear various stories about live capture of the Z1 i.e. the analog signal may or may not digitise to 4:2:2, it may or may not be 8 or 10 bit, it doesn