Commentary for Avodah Zarah 76:19

R. Yohanan says that even if we know that wine was put in the pickled foods, it is permitted to derive benefit from them. But R. Meir prohibited one from deriving benefit from murias. So how would he distinguish between the two?
The murias mixture has the presence of the wine—therefore it is of a higher degree of prohibition. But the wine in the pickled food is there in taste but not substance. Therefore it is only prohibited to eat this food; it is not prohibited to derive benefit from it.