Canon R5 has a
45.0MP Full frame (36 x 24 mm ) sized CMOS sensor and features Digic X processor. On the other hand, Leica M10 Monochrom has a
41.0MP Full frame (36 x 24 mm ) sized Monochrome CMOS sensor and features Maestro II processor.
Below you can see the R5 and M10 Monochrom sensor size comparison.
Sensor Size and Resolution Comparison image of Canon R5 and Leica M10 Monochrom Cameras
Canon R5 and Leica M10 Monochrom have the same sensor sizes so they will provide same level of control over the depth of field when used with same focal length and aperture. On the other hand, since Leica M10 Monochrom has 86% larger pixel area (36.01µm 2 vs 19.30µm 2 ) compared to Canon R5, it has larger pixel area to collect light hence potential to have less noise in low light / High ISO images.
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
Canon R5
or the
Leica M10 Monochrom ,
including hyperfocal distance.