I just did a completely unscientific comparison between the 5D Mark III Magic Lantern Raw and the A7S S-LOG2 in a very high contrast challenging environment. The goal was to avoid any clipping in the highlights whilte trying to recover as much shadow detail as possible. The reason for this test was that I haven't found any similar tests online.
A high quality Cineform 444 Filmscan quality file can be downloaded at:
https://drive.google.com/file/d/0B0u...ew?usp=sharing
I hope someone finds this informative.