The Worst Horseman: Roma or Mongo?

The Four Horsemen were, unquestionably, one of the greatest factions in the history of professional wrestling, if not THE greatest. There has been debate over which version was the greatest: the original group consisting of Ric Flair, Arn Anderson, Ole Anderson and Tully Blanchard, or the version featuring Ric, Arn, Tully and Barry Windham. It's a debate that has been going on for a long time, and there are certainly valid arguments for both incarnations.