Epson R-D1x has a
6.0MP APS-C (23.7 x 15.6 mm ) sized CCD sensor . On the other hand, Sony A6500 has a
24.0MP APS-C (23.5 x 15.6 mm ) sized CMOS sensor and features Bionz X processor.
Sony A6500's sensor provides 18MP more than Epson R-D1x'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 R-D1x and A6500 sensor size comparison.
Sensor Size and Resolution Comparison image of Epson R-D1x and Sony A6500 Cameras
Epson R-D1x and Sony A6500 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
Epson R-D1x
or the
Sony A6500 ,
including hyperfocal distance.