SUMMARY
A comparison between the Sony a7R VI and a1 II highlights their distinct strengths. The a7R VI leads in resolution with 66 megapixels and a 16-stop dynamic range, plus a brighter EVF and lower price. The a1 II excels in speed with double the autofocus calculations per second, superior rolling shutter performance, and a longer buffer, making it ideal for fast action. Both cameras offer similar video capabilities, including 8K at 30 fps and 4K at 120 fps, with the a1 II's rolling shutter being the main video differentiator.
TAKEAWAYS
Sony a7R VI has higher resolution (66MP) and a lower price point.
Sony a1 II offers faster autofocus (120 calculations/sec) and better rolling shutter.
Both cameras provide advanced video features like 8K/30fps and 4K/120fps.
The a1 II includes a gigabit Ethernet port for faster wired connectivity.