…One requires “Kaylee + Fresh Fruit” and the other requires “Guns + River”.

A: This is not a mistake, although it is unusual. The first version (Kaylee + Fresh Fruit) refers to a scene in which Kaylee chases after River in pursuit of a stolen apple and says “No power in the ‘Verse can stop me” when she gets it back. The second version (River + Guns) refers to the scene at the end of that episode, when River quotes Kaylee’s statement back to her, after shooting those 3 dudes. This is why the second version has quotes around it — River is quoting Kaylee.