Sony RX1R has a 24.0MP Full frame (35.8 x 23.9 mm ) sized CMOS sensor . On the other hand, Nikon DL24-500 has a 21.0MP 1" (13.2 x 8.8 mm ) sized BSI-CMOS sensor and features Expeed 6A processor.
Another difference between these two cameras is that Sony RX1R's sensor lacks anti-alias (Low-Pass) filter. Removing anti-alias filter increases the sharpness and level of detail but at the same time, it increases the chance of moire occurring in certain scenes.
Below you can see the RX1R and DL24-500 sensor size comparison.
As seen above, Sony RX1R has a 7.4x Larger sensor area than Nikon DL24-500. Larger sensors give photographer more control on the depth of field and blurry background compared to smaller sensor when shot in same focal length and aperture.