Nikon Z5 II has a
25.0MP Full frame (35.9 x 23.9 mm ) sized BSI-CMOS sensor and features Expeed 7 processor. On the other hand, Canon R6 II has a
24.0MP Full frame (36 x 24 mm ) sized CMOS sensor and features Digic X processor.
Below you can see the Z5 II and R6 II sensor size comparison.
Sensor Size and Resolution Comparison image of Nikon Z5 II and Canon R6 II Cameras
Nikon Z5 II and Canon R6 II have almost the same sensor size, so neither of them has any significant advantage over the other in terms of providing control over depth of field when used with the same focal length and aperture.
Sensor size sets the circle of confusion, so it drives how much depth of field each
of these bodies gives you at a given aperture. You can calculate it exactly for the
Nikon Z5 II
or the
Canon R6 II ,
including hyperfocal distance.