Last I checked, Sabian wasn't made by Zildjian... Gather 'round hehe
*Story Time!*
Basically, Zildjian and Sabian were the same company, waaaaay back in the day. They're the last names of the people who created Zildjian, I think. They had conflicting interests in how the cymbals should sound, or something more retarded than that, and had a split. Zildjian stayed Zildjian, and Sabian was born. They've quite similar, yes, because of the patterned grooves in the cymbals came from the same background. However, I seem to remember something about being able to patent the patterns, so Sabian had to do something slightly different from Zildjian, because of patent laws.
As I remember it, that's the basic thing there... They're not made BY Zildjian... they used to be one company...
If I'm off my rocker here, however, let me know. ^_^