Grug
Veteran
Possibly interested in the upcoming F7S, I don't get if and why XAVC would be computationally heavier than Prores.
The long gop version will be, obviously. But an intraframe codec should be edit friendly as Prores. Isn't it?
As I understand it, XAVC is based on MPEG-4 architecture. ProRes is based on MPEG-2. MPEG-4 offers greater efficiency in terms of datarate, but since the compression is more complex, it requires more processing power.
Both codecs will cut like butter though on any modern computer, so it's not a big issue.
To my mind the bigger difference is simplicity of ProRes' self-contained file format. There's no complex folder structures required to store it. You just have a file you can drag and drop wherever you like - between the workflow simplicity and nice image quality it offers, ProRes remains the industry standard for good reason IMO.
Unless your working with an end-to-end XAVC workflow (where 4:2:2 suffices), I think the easiest workflow with these cameras is actually RAW + Proxies. You just store them side by side, edit nice and fast with your proxies, then conform the RAW files at the end for the easy, powerful grading. I thought the whole process would be daunting at first, but it's actually nice and simple, since everything you need is recorded in-camera.