Which has better background blurriness?APSC 50mm vs M43 75mm

ageminmo wrote:

I was researching to buy a light combo for doing portraits and I enjoyed using GM1 with Olympus 45mm but I know the bokeh of Sony 50mm is better. The question now is when compared to Oly 75mm, which has more bokeh between these two cameras:

Any M43 camera with Olympus 75mm F1.8

versus

Any Emount APSC with Sony 50mm F1.8

COnsidering the effective aperture calculation for both?

I read that you can compare the background blurriness by dividing the focal length and the aperture.

So the Olympus combo will yield a ratio of ~42 and the Sony combo will yield ~28. That's a lot!

But they are from different systems, so if I will use their effective apperture..

Olympus 75mm will have 21[75/(1.8x2)] and SEL50 will have 18[50/(1.8x1.5)].

Then they are almost the same! WIth the sony combo, I dont need to be much farther to the subject and the body+lens combo is lighter. (Of course, I would be needing a good IBIS body like GX7, EM5, EM1, EPM2 etc and not GM1/GM5)

Never mind the 75mm, I've shot the 45mm f/1.8 extensively and think it is a better lens than the Sony 50mm f/1.8 OIS (one of my best friends has it) and much prefer the effective focal length of 90mm rather than the focal length of 75mm that the Sony gives, which to me is neither here nor there and also limits its use as a telephoto lens. The 45mm f/1.8 is also much smaller and lighter and thanks to the greater focal length, I find both to have about the same ability to blur backgrounds, and the Olympus probably has a bit more.

And never mind the fact that I think it just has better picture quality.