Regularly the standard Clustered Column Chart is used to compare two measures within a number of categories. If one of these measures has been added as a reference (secondary measure) to increase the context of the primary measure it would be better to clearly show this priority difference.
This is precisely what the Lipstick Column Chart does: It shows the primary measure per category on the foreground, and places the secondary measure behind it for a precise comparison of both values. Since both values are placed on top of each other it also becomes a more compact alternative to show both measures per category.
Key features of the Lipstick Column Chart are:
Format the objects: Each of the bars (both primary and secondary) can be formatted like the bars in the Power BI Clustered Column Chart;
The Axis formatting options are in line with the options you know from the Power BI Clustered Column Charts, so no need to learn a new interface;
Selection & Highlighting: Like in standard Power BI Charts you can make use of the Selection & Highlighting functions within the Lipstick Column Chart;
Context menu: Like in standard Power BI Charts you have access to the context menu to Include/Exclude data points;
Full tooltip support: Besides the default Tooltip behaviour (show the value of the element you hover) you can also add additional feeds to the tooltip.