Both Sony A7 V and Sony FX2 have Full frame sized 33.0 MP resolution sensors so sensor size and resolution is not a differentiator between these two cameras.
Another difference between these two cameras is that Sony A7 V'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 moiré occurring in certain scenes.
Below you can see the A7 V and FX2 sensor size comparison.
Sensor Size and Resolution Comparison image of Sony A7 V and Sony FX2 Cameras
Sony A7 V and Sony FX2 have the same sensor sizes so they will provide same level of control over the depth of field when used with 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 A7 V
or the
Sony FX2 ,
including hyperfocal distance.
