Sony’s “affordable” global shutter A9 III likely changed the competitive landscape. For photography Z9’s stacked sensor is superb but videography is a different story.
The Sony camera can only record up to 4K in-body, and only with h.265 or similar formats up to 10 bit.
The Nikon can record full-frame RAW with 12-bit log, which is far more useful for colorists to work with than anything the Sony can record.
Even the Nikon DX crop mode has more pixels and more HDR range than the Sony!