In the first two comparisons we see the behavior of mark mark II and III in low light situations, high ISOs, skin, hair, etc.. I think that the 5D mark II has a sharper picture, but the problem is with the new codec that is giving a headache to creators.
Camera: Canon 5D mark III a 1080p – ISO 160
– Contax Zeiss 85mm F1.4
– Tokina 11-16mm F2.8 a 16mm.
The third video, was created by Andrew Reid. It detects problems with the codec which gives ISO 160 noise in the image, whichdoes not have to do with ISO but with the codec apparently.