Edobaud and BLZ passenger cars are totally different. Edobaud cars are much larger, almost 1 gauge but running on 0 gauge. BLZ cars are a bit short for their 0 gauge, but further approximately to scale. BLZ also made H0 gauge trains, but that is another story. Edobaud and BLZ both have different couplers which are not compatible with anything else. Edobaud information: http://www.tcawestern.org/edobaud.htm, there is not such information on BLZ (there is not much interest in BLZ apart from their electric GG1 like locomotive, search the forum and you will find it). You would be much better of by looking for some JEP cars; these are generally more available and lower priced (and nice looking).
Edobaud:
BLZ:
Regards
Fred