absolutely not. they will taste like two completely different things. Duck sauce can be more sour and most of the time it is used with egg rolls. Plum sauce is much sweeter, but will have a bitter flavor if eaten by itself. It is also a completely different fruit base.
Is duck sauce and plum sauce the same?
Duck sauce typically has an apricot base.
Reply:Maybe yes, maybe no.
Duck sauce is any sauce made to go on cooked duck. Plum is one of them, frequently used in Chinese cooking. Orange is another--also sometimes used in Chinese cooking.