It's a little surprising that the bar charts are not more functional with the data they provide. Mousing over a bar shows a total number, but the associated data in the accompanying bar chart next to it doesn't highlight on mouse-over.
So for example, on the Competitor depth report bar chart, mousing over a bar might show there are 5 out of 10 businesses targeting that keyword ad. In the Competitor strength report bar chart it could also be showing those specific 5 businesses with highlighted bars in a highlight color.
It can also work in reverse where the Competitor strength report bar chart, on rollover, highlights the keywords that specific business is targeting on the Competitor depth report bar chart.
To take it further, on any of these rollovers, a pop-up in the rollover could have an "Export data" button to export the data targeted by the rollover on that business.
The attachment shows how the right-hand chart can show the associated businesses when there's a mouse-over on the right-hand chart. It could work the same way for a mouse-over on the right-hand chart.