Sony A6500 has a
24.0MP APS-C (23.5 x 15.6 mm ) sized CMOS sensor and features Bionz X processor. On the other hand, Samsung Galaxy NX has a
20.0MP APS-C (23.5 x 15.7 mm ) sized CMOS sensor and features DRIMe IV processor.
Below you can see the A6500 and Galaxy NX sensor size comparison.
Sensor Size and Resolution Comparison image of Sony A6500 and Samsung Galaxy NX Cameras
Sony A6500 and Samsung Galaxy NX 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 A6500
or the
Samsung Galaxy NX ,
including hyperfocal distance.