Tornado charts (also sometimes known as Butterfly charts) are the ideal tool if you need to compare 2 sets of data on multiple criteria.
A typical use is to visualize how 2 firms compare on various aspects, such as:
Number of employees
Sales for each business line
The Tornado chart is similar to a columns chart, but instead of having the columns for each series side-by-side, one will be displayed on the left and one on the right.
With Power-user you can create a Tornado chart with 2 clicks and make your data comparison visually stand out.