Matthias Lehnherr was involved in testing four cameras on how well they handle autofocus.
It was a quick and dirty non scientific test without any camera vision having colour grading. So as is where is.
The settings for each camera was:
normal face dedection mode
standard or normal tracking speed and a wide AF area
Sony Alpha 7S Mark II mit FE 28–70mm 3.5–5.6 OSS
Sony Alpha 7R Mark II mit FE 28–70mm 3.5–5.6 OSS
Sony PXW-FS5 mit Sony Vario-Tessar T* FE 24-70mm f/4 ZA OSS
Canon C300 Mark II mit Canon EF-S 18-135mm 3.5-5.6 IS STM