Why bokeh spot size is different on "equivalent" pictures

[GetUp]

Here is E-M1 with 42.5/1.2 vs D800 Nikkor 85/1.8 (full frame).
WIll bokeh blur spots SIZE is so different?

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[Evan614]

different glass / lens

 

[shg2]

As far as I know the DoF for the 1.2 m43 is f2.4 in FF world thus f1.8 is shallower and therefore spread wider. I think the number of aperture blades play role too.
I am seeing the picture with 42.5/1.2 is sharper even at this small size

 

[pellicle]

Here is E-M1 with 42.5/1.2 vs D800 Nikkor 85/1.8 (full frame).
WIll bokeh blur spots SIZE is so different?

magnification. You are magnifying x2 as a result of using a cropped capture. Compare at the same magnification (meaning look at full frame at 50% and 4/3 at 100%) and you'll see them the same (with same lens on both cameras).