the 35mm 1.4 is another level, i can post a pic. The keboard was at lowest power light and the temperature of the light source under the keyboard are very similar to the temperetures of the room so there arn't supposed to be any blues.
the dr differes (check dxomark for that). The 5d mark iii have not moire and aliasing and all the others have different degrees of it. The resolution also varies, 5d iii has highest, 5d ii second, 50d third, 7d 4th, 6d 5th.
i might be wrong but i thing you can set the gh4 to shutter angle instead of shuttterspeed so you can set it to 180 degree. I used magic lantern with canon dslrs earlier and that way you can set 1/48th
i agree that the a7rii is a much superior camera, i myself is a sony a7 owner and i never thought i could get myself into the FE system because of the high prices but the sony a7 can be found for 600$ on ebay if you hunt for a while which completely amazing for what you are getting.
just a quick little opinon, you can get an nikon to sony tilt shift adapter. It means that any nikon lens you have can be a tiltshift. It is much cheaper and work really well. I had one before but sold it because it didn't fit my shooting style.
a7rii still have the low resolution in full frame and much more noise in full frame. Super 35 has about a 1 stop disadvantage to the a7sii and about the same detail. As stated about, its really super 35mm camera vs a full frame camera.
http://www.sonyalpharumors.com/surprise-sony-announces-a-new-a7rii-and-a7sii-firmware-update-which-also-improves-the-image-quality/ So the Sony A7rii and A7sii gets longer 4k recording when used with the vertical grip with the new firmware update.