Leica Q2 Monochrom has a
47.0MP Full frame (36 x 24 mm ) sized CMOS sensor and features Maestro II processor. On the other hand, Sony RX1R has a
24.0MP Full frame (35.8 x 23.9 mm ) sized CMOS sensor .
Leica Q2 Monochrom's sensor provides 23MP more than Sony RX1R'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.
Another similarity between these two cameras is that both Sony RX1R and Leica Q2 Monochrom sensors lack anti-alias (Low-Pass) filters. Removing anti-alias filter increases the sharpness and level of detail but at the same time, it increases the chance of moiré occurring in certain scenes.
Below you can see the Q2 Monochrom and RX1R sensor size comparison.
Sensor Size and Resolution Comparison image of Leica Q2 Monochrom and Sony RX1R Cameras
Leica Q2 Monochrom and Sony RX1R 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
Leica Q2 Monochrom
or the
Sony RX1R ,
including hyperfocal distance.