Here is an interesting eye AF test comparison between the Canon EOS R, Nikon Z6, Sony a9, Sony a7III, Sony a6400 and Fujifilm X-T3 cameras.

Mirrorless enthusiasts are familiar with Eye AF which is found on Sony mirrorless cameras, including the a7 III and a7R III against which the Z6 and Z7 compete.

Nikon’s upcoming firmware is planned that will add Eye-detection AF, CFexpress support and Raw video over HDMI to the Z6 and Z7, with AF and AE improvements also coming in May. Check more details here.
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Read full post here:
https://www.dailycameranews.com/2019/03/canon-eos-r-nikon-z6-sony-a9-sony-a7iii-sony-a6400-and-fujifilm-x-t3-eye-af-test-comparison/