OZ Magnesium wheels

I posted the in FB but I suppose it belongs here...



Does anyone know the actual weight difference between the OZ 12 spoke alloy/aluminum wheels and the 5 spoke magnesium wheels in 8" and 10" width. I am trying to understand what my weight savings would be. I have VD hubs with offsets straight from FE.



There are threads which discuss this but no actual weights.

Doug