lakbum,
I have the Shadow Custom. Looking at the Target, I believe the cocobolo grips and sight are the differences.
You can email angus or Rob Bagnato at CZ Custom if Angus does not get a chance to confirm this here.
BTW if you decide on the Target for the rear sight, but want the thin aluminum grips vs. the wood, let me know, maybe we can swap grips. I have a set of Red ones, but they are too thin for my taste.
Good Shooting.