Firstly, please have a look at how Summarized data works. This type of export shows you only the data (columns and measures) that is being used to create the visual. If a visual has a hierarchy, you'll export aggregated data for the full hierarchy. This means that even though your current view of the chart shows two columns (two Country/Regions), your summarized data will display four rows -- one for each City in the hierarchy.
In addition, if there are filters applied to this visual, then you will export data with filters. If your visual has aggregates (sum, average, and so on), the export will also be aggregated.