I've been asked a few times about the size and weight of the Z9 compared to other Z cameras. I can only compare it to my Z7 with the battery pack. The Z7 with the battery pack and two batteries is almost exactly the same dimensions as the Z9, but it is lighter than the Z9.
Compared to D800/D850? With the battery grips installed the D's are definitely heavier and much larger in all dimensions.
Also, the FTZ fits just fine on the Z9 and clears the battery compartment with ease.

What strap is that on the D camera?

Thanks