In a content page's diff, there is a link to the page of the editing user and a link to edit an old revision and save it as the current. On flow page diffs they're missing.
Here a compare of features within content page diffs, flow diffs and the history of those page types
|Feature||Content page||Flow page|
|Edit an old revision||Yes||No||No||No|
|links to user page||Yes||Yes||No||Yes|
|comperation of chosen revisions||Yes||=||Only neighbours||=|
There should be more features. The most useful would be the link to userpage and "edit an old revision". This would be more comfortable.