Check out this Panasonic S1 vs Nikon Z6 AF test video. The newly announced Lumix S1 & S1R uses the same Depth from Defocus AF system as Panasonic’s Micro Four Thirds cameras. As we all know that Nikon Z6 features 273 Phase AF points based Fullframe Sensor.
Panasonic S1’s ($2,497.99 at Amazon, B&H, Adorama) DFD is contrast-detect based but uses an understanding of each lens’s optical characteristics to work out where to drive the focus to. The camera’s AF Tracking mode has been updated, too. It now tracks whatever is under the focus point when you half-press (or AF-On) and then reverts to your original AF area when you release.