That additional 1 frame gain from UHS-II SD card doesn't inspire confidence. High end UHS-II cards are capable of delivering write speeds in excess of 240MB/s so wondering if the UHS-II controller used for this camera doesn't support half duplex(312MB/s) and restricted it to full duplex(156MB/s). Even with UHS-I standard it was only with release of 80D that Canon was able to support the fastest write performance(SDR104) and it was lagging behind competition in that aspect for the longest time. This camera already has AA filter so wondering how much more detail we are going to lose from using compressed C-RAW format in order to gain additional buffer depth.Bah, 32Mpix at 10fps is a lot of data to move, though I would have expected a larger difference between UHS-I and UHS-II cards. I expect the buffer flushing time to be noticeably faster with UHS-II, however.
Anyway, when shooting action I see no reason not to use C-RAW; the loss of information really is minimal. 39 C-RAWs at 10fps is quite impressive and should be enough for anyone considering this camera.
Found an unboxing video of this camera: