Sony FX5 has a
16.0MP Full frame (35.6 x 23.8 mm ) sized BSI-CMOS sensor and features Bionz XR2 processor. On the other hand, Canon R6 V has a
32.5MP Full frame (36 x 24 mm ) sized CMOS sensor and features Digic X processor.
Canon R6 V's sensor provides 16.5MP more than Sony FX5's sensor, which gives a significant advantage in real life. You can print your images larger or crop more freely.
On the other hand, please keep in mind that Max sensor resolution is not the only determinant of resolving power. Factors such as the optical elements, low pass filter, pixel size and sensor technology also affects the final resolution of the captured image.
Below you can see the FX5 and R6 V sensor size comparison.
Sensor Size and Resolution Comparison image of Sony FX5 and Canon R6 V Cameras
Sony FX5 and Canon R6 V 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
Sony FX5
or the
Canon R6 V ,
including hyperfocal distance.