Although the video i only at 720 on vimeo, this 1080p 96fps slo-mo on the GH4 still doesn't look as soft as the 5d3 internal 1080p footage.
When you do your next test, please do 5d3 internal recording codec as well as the RAW, not only are we comparing visual quality and "cinematic look". but we should be considering work flow and turn around time.
I have a 5d3 with RAW hack that can record continuous at 24p and its super sharp.. but I can't use it on almost anything when it comes to justifying the extra work involved to actually use it(Space, workflow, extra cards, etc). So most of my work I have to use the internal codec which looks terrible compared to the RAW and just looks sad compared to the GH4 4k footage.
RAW on 5d3 is a great innovation, don't get me wrong, but for the people that have to run and gun, or have fast turn around time... its really hard to justify using it.
My main shooting is Steadicam work for a full day of Run and gun, Full Frame on the 5d3 is Hell most of the time too(luckly most of it is out doors and i can stop down), The internal codec almost never looks good when "everything" is in focus, Its more like "everything is soft" compared to the FS700 i'm matching up with.
/rant
Looking forward to the rest of your reviews and firmware 1.0 stuff. :-)