Sigma Art 50mm f/1.4 vs. Leica Nocticron 42.5mm f/1.2

Comparison between two great lenses - the revered Leica Nocticron and the amazing Sigma Art 50mm f/1.4 coupled with the Metabones Speed Booster XL 0.64x. Which is better?
Camera: Panasonic Lumix G85
Music by Eric Matyas
www.soundimage.org
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[@Endogamy]

Amazing, I can see a very but very slight differences but not so important. Those micro crystal sharpness, belongs to Leica.

[@poman911]

I'm hard pressed to tell the difference in sharpness and color. I do note that the Leica has shallower DOF and nicer bokeh.

[@MrPERPS]

With the sigma you need a metabones,,,,,why not just use the nocticron lol