Here's what level differences could be expected when game loading isn't bottlenecked by processing:
https://www.realhardwarereviews.com/silicon-power-us70-1tb-review/11/
Not much left to shave away by 7GB/s drives from what 5GB/s drives achieve...
Any effects and (re-)encoding will be processing power bottlenecked.
And during import source storage device is bottleneck and in export it's likely target device. (or web connection)
https://www.realhardwarereviews.com/silicon-power-us70-1tb-review/11/
Not much left to shave away by 7GB/s drives from what 5GB/s drives achieve...
Really only when doing cutting&pasting with direct stream copying.With your use cases I would say editing would have the most benefit to the drive speed, especially if its used as the disk where the videos are stored.
Any effects and (re-)encoding will be processing power bottlenecked.
And during import source storage device is bottleneck and in export it's likely target device. (or web connection)