Sony a7C vs Sony a7 III: Which is better?

Sony’s a7C is an attempt at a compact full-frame camera that retains the capability of a larger model. It has an awful lot in common with the still-available a7 III, with sensor, processor and most key specifications shared between the two models.

However, while the $1800 launch price of the a7C is $200 lower than that of the a7 III, the bigger camera has been on the market for more than two years longer and consequently sells for much less in many places.

So which camera is better for your needs?