Ricoh GR II has a
16.0MP APS-C (23.7 x 15.7 mm ) sized CMOS sensor and features GR Engine V processor. On the other hand, Ricoh GXR Mount A12 has a
12.0MP APS-C (23.6 x 15.7 mm ) sized CMOS sensor .
Below you can see the GR II and GXR Mount A12 sensor size comparison.
Sensor Size and Resolution Comparison image of Ricoh GR II and Ricoh GXR Mount A12 Cameras
Ricoh GR II and Ricoh GXR Mount A12 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
Ricoh GR II
or the
Ricoh GXR Mount A12 ,
including hyperfocal distance.