The Canon EOS R5 is a 8K30p capable flagship mirrorless camera and currently is the best selling full frame mirrorless camera in the world. Here is the Eye AF comparison about Canon EOS R5 vs Sony a7R IV vs Nikon Z7.

The Canon EOS R5 is a 45MP full-frame mirrorless camera that shoots full-width 8K video, has next-generation Dual Pixel autofocus and a stabilization system that provides up to eight stops of shake correction with a variety of lenses. The Canon EOS R5 and Canon EOS R6 are selling like hot cakes.

Jared Polin tests the Canon EOS R5‘s image quality and Eye AF, including high ISO/low-light noise, dynamic range. 
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https://www.dailycameranews.com/2020/08/canon-eos-r5-vs-sony-a7r-iv-vs-nikon-z7-eye-af-comparison/