I noticed Jupiter Ascending used Leica lenses. After a little research I found this: http://www.hurlbutvisuals.com/blog/2014/03/why-do-we-want-flat-glass/
The Cooke has distortion and less pleasing bokeh (only 5 blades), however it just looks better ("3D"). Testing cameras and lenses against each other is a useful exercise. I've been testing the GH4 against the A7S in studio lighting and the GH4 is looking better, especially in skintones. I had tweaked the A7S to look similar to the 5D3 and thought it looked pretty good until I did the same with the GH4. Under studio lighting, the GH4 produces nicer skintones and a cleaner image (+ 4K!). In December the Atomos Shogun will bring 4K to the A7S, however the GH4 will get 10-bit 422 4K at the same time (vs. 8-bit for the A7S).