Leica M Edition 60 has a
24.0MP Full frame (36 x 24 mm ) sized CMOS sensor . On the other hand, Canon EOS C400 has a
19.0MP Full frame (36 x 24 mm ) sized BSI Stacked CMOS sensor .
Leica M Edition 60's sensor provides 5MP more than Canon EOS C400'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 M Edition 60 and C400 sensor size comparison.
Sensor Size and Resolution Comparison image of Leica M Edition 60 and Canon EOS C400 Cameras
Leica M Edition 60 and Canon EOS C400 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 M Edition 60 has 14% larger pixel area compared to Canon EOS C400, it has potential to collect more light on pixel level hence 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
Leica M Edition 60
or the
Canon EOS C400 ,
including hyperfocal distance.