When reviewing in the reopen votes queue, I personally have found that the Revision (highlighted differences) tab is by far the most useful in efficiently casting a vote. Often they are just grammar changes to old posts, which show up really clearly in this view.
It may well be just me who finds this, but if others are constantly switching to the Revision tab first to see changes before swapping back if necessary perhaps the default tab could be changed.
The post has been edited, in this view I have to read both questions to see if the duplicate issue has been addressed.
However in the Revisions view it is very quickly evident that there are only formatting changes made and no re-open vote should be cast.