https://bgr.com/2019/03/18/iphone-vs-samsung-xs-max-galaxy-s10-plus-speed-test/amp/
Based on the results, it looks like Apple used better storage with a faster interface. But the large amount of RAM in the S10 allows more to be kept in memory, speeding things up over time.
The expectations are Samsung will use highspeed storage on the Note 10.