Sony a6300 vs. FS5, 120 fps: Which is Which?

What's the difference in image quality between the Sony FS5 with a freakin' Zeiss Milvus 100mm f/2 (adapted via Commlite) -- and the new Sony a6300 with Sony's little E 50mm f/1.8? You be the judge. Just remember: the price difference is a little more than $6,000.

I was able to get my hands on the Sony FS5 recently and paired it with the Zeiss Milvus 100mm f/2. Magic, especially at 120fps (HD). Right now, I have the new Sony a6300 on loan, and paired it with my own Sony E 50mm f/1.8 OSS at 120fps (HD). Same codec and frame rates, slight differences in lighting, framing and exposure. No corrections other than exposure and saturation.

Let me know what you think!