Simple OMD versus GH3.

I think the reason is that Live MOS is a licensed name that can be used with any sensor brand. It is just a name.

Initially Live MOS sensors were hybrid, using CCD and CMOS features. Don't know how is now, but they may have changed for CMOS only.

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Simplicity is the ultimate sophistication.
God always take the simplest way.
Imagination is more important than knowledge.
God is the tangential point between zero and infinity.
Aleo Photo Site