Sony QX1 has a
20.0MP APS-C (23.2 x 15.4 mm ) sized CMOS sensor and features Bionz X processor. On the other hand, Sony A6100 has a
24.0MP APS-C (23.5 x 15.6 mm ) sized CMOS sensor and features Bionz X processor.
Below you can see the QX1 and A6100 sensor size comparison.
Sensor Size and Resolution Comparison image of Sony QX1 and Sony A6100 Cameras
Sony QX1 and Sony A6100 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
Sony QX1
or the
Sony A6100 ,
including hyperfocal distance.