Nikon D780 has a
25.0MP Full frame (35.9 x 23.9 mm ) sized BSI-CMOS sensor and features Expeed 6 processor. On the other hand, Leica M Edition 60 has a
24.0MP Full frame (36 x 24 mm ) sized CMOS sensor .
Below you can see the D780 and M Edition 60 sensor size comparison.
Sensor Size and Resolution Comparison image of Nikon D780 and Leica M Edition 60 Cameras
Nikon D780 and Leica M Edition 60 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 D780
or the
Leica M Edition 60 ,
including hyperfocal distance.