Micro four thirds versus APS-C as someone who uses both

What’s better: micro four thirds or APS-C? Are these two sensor formats at odds? Could any question spark an internet argument more quickly than comparing sensor sizes? There is no doubt that there are advantages and disadvantages of each. Today, I would like to talk about why I (gasp) choose to shoot with both formats. And perhaps surprisingly, my reasons have very little to do with sensor size.

A Little Bit About the Formats

Of course, the most obvious difference between APS-C and micro four thirds is sensor size. You can get an idea for this difference from this image, with a full-frame sensor included for comparison:

To-scale representation of three sensor formats

As you can see, the difference between APS-C and micro four thirds is a bit less than the difference between full frame an APS-C. In fact, the area of an APS-C sensor is about 1.6 times the area of a micro four thirds sensor, albeit with an aspect ratio of 3:2 for APS-C rather than 4:3 for micro four thirds.