1DX III vs R5 AF

[Fast Glass]

Yes, my experience was with a rented 1DX III only and I didn't have the pleasure of comparing them side by side with the R5.

DPAF was fine with good lighting but it never did live up to the PDAF of 1DX III. But compared to my 1D III the 1DX III is on another level.

I couldn't actually get a low enough light level for the 1DX III to not focus. I was shooting in light so low I could barely see and it was focusing with the Sigma 105mm f/1.4 and take a ussuable pic. Well kind of, 800,000 was ridiculously noisy!!!!

VS no matter what I did DPAF just couldn't lock on at all.

This is an extreme example but it was a testament of how incredible the AF of the 1DX III is. It is truly next level.