SD card for pocket cam

Anybody have any experience using the cheaper Sandisk 64GB Extreme SDXC UHS-I with the pocket cam?

BMD lists both the extreme SDXC and the extreme pro SDHC cards as approved for prores. The SDXC cards are about half the price of the SDHC's. Just wondering if there's any reason to not save money and go for the more expensive stuff.

I have the Sandisk 45mb/s cards (64gb) and it works fine with Pro-Res... I tried a 41mb/s card (Delkin) and it didn't work...