1. A computer-implemented method for automated slide content comparison, the method comprising executing on a computer processor the steps of: in response to an identification of an input slide, generating text content confidence scores that represent amounts of similarity of slide text content of the input slide to compared text content of a plurality of slides that are included within slide presentation files of a repository; generating graphic element content confidence scores that represent amounts of similarity of graphic content of the input slide to compared graphic element content of the respective ones of the plurality of slides; generating similarity confidence scores for each of the respective ones of the plurality of slides as functions of weighted averages of the text content confidence scores and the graphic element content confidence scores generated for the respective ones of the plurality of slides, wherein the graphic element content confidence scores are weighted differently from the text content confidence scores; and ranking the plurality of slides for similarity to the input slide as a function of the generated similarity confidence scores.