In the below video review, Wolfcrow's Sareesh Sudhakaran provides an in-depth review of the Sony a7S II and compares it with the Sony a7R II and a7S.
He writes on his site, "All said and done, the Sony a7S II is a winner, at least until the a7S Mark III comes out next week. If you don’t want to invest time and effort in learning how to expose and grade log, then buy a GH4. It’s cheaper, and it gets the job done. That extra image quality the a7S II will give you won’t come with just the push of a button. If you want that, rent an Arri Alexa."
Click the link below to read Sudhakaran full report.