Overlay comparisons

While looking for some new fixed-width fonts I came across the below image which is a really intuitive way of visualizing the differences between a given set of fonts, created simply by overlaying corresponding letters.

Searching to see if this idea was used elsewhere and found it used in a comparison of large planes on Wikipedia. The removal of any interior plane detail makes the comparison not visually cluttered by any extraneous information and the overlaying of the planes makes scale comparisons instantaneous.

It is additionally a simple effect to produce, needing only scaled and aligned overlayed layers. Below is an image I created of the two most recent Arduino development boards.