[Leica] M lens vs. E-lens vs. u4/3 lens

[Richard Man]

I know a number of you use the Sony E-mount cameras and a number of you use
the Olympus/Panasonic u 4/3 lens. Any opinions on strength and weakness of
each?

Note I am interested in the lens, not the various bodies. Note2: I am aware
the Sony E-mount cameras use APS-C sensor vs. Olympus 4/3 sensor.

Finally, which system is more friendly with the Leica M lens? Mainly
interested in the performance of the 35mm/50mm M lens.

Thanks

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