David, thanks for your comment. 100% agree.
The smaller sensor will not hold as much detail as the full frame Mkiii. The 5D will give you a bit more dynamic range, that might matter to your footage.
Thanks for your informative reply. I only quoted this sentence because I'm curious what you mean by it. 5D has more detail? In what, resolution? Because that not true imo as smaller sensored camera's have proven to resolve more detail than the 5D (and others)
Also, the Black Magic Cinema Camera, and even the small GH3, have more DR than a 5D.
That means it is not really the full frame sensor that's responsible for more detail / DR, but the processing by the other electronic parts. If all camera's were created equal (and perfect), the larger sensor would gave the best image. That is what you meant, right?