SUMMARY
While the Nikon Z6 II remains a capable full-frame camera, the Nikon Z5 II is presented as a better value option, often The Z5 II features a newer processor, leading to improved autofocus and higher JPEG burst rates, along with significantly better in-body image stabilization. It also offers internal 10-bit N-Log and 12-bit RAW video output, features that require external devices or paid upgrades on the Z6 II. Although the Z6 II has a more professional dual-card slot setup (CFexpress/SD), the Z5 II's dual SD card slots and overall performance make it the preferred choice for new purchases.
TAKEAWAYS
Nikon Z5 II offers better value than the Z6 II for budget full-frame photography.
Z5 II boasts superior image stabilization (up to 7.5 stops) and faster JPEG burst shooting (30fps).
The Z5 II provides internal 10-bit N-Log and 12-bit RAW video, unlike the Z6 II.
Z5 II features a fully articulating rear LCD, while the Z6 II has a tilting screen.