i dont think you can shoot 60fps in 5X mode. no matter whatever your setting is in canon menu when u zoom in 5X it wil change to 30fps
I was able in 5X to shoot 24 fps. I was testing 1920x1080 12 bit lossless in 5X, but 5X initially selected goes to 30 fps,
but if you set fps override Timer A to 842 (+170) I was getting 23.9 fps.
I could turn global on, with half shutter press, then set fps override to 23.9 and timer A to +170, and get 24 fps.
Global on you get screen updates every 3s or so. In camera video playback is slow. The big problem now is in camera liveview and playback.
However with 5X cant get higher than 30p. It would be interesting to compare 70D 12bit raw to 80D H264, to see how 80D sensor DR stacks up.
I suppose to answer my own question,
70D 12 bit raw if shot 1/3 over (expose to right) then it should have better detail.
80D probably less noise in low light without processing.
However detail can be traded off, to yield less noise, so it probably is a very fair comparison in the hands of skilled shooter.
I suspect 70D wins via better highlight and overall detail but low light noise about equal for same ISO. Now for someone to check it out.
The 80D probably wins for high ISO shooting (ISO 3200 in H264) as raw tends to max out around ISO 800 (before hot pixels kick in).