So I get some of the basic differences between a USB flash drive's controller and an SSD controller, like mentioned here https://superuser.com/questions/919...l ...

For example, the SK Hynix Tube T31 hides a proper M.2 NVMe SSD with a DRAM cache inside its body and delivers an average ...

Most USB 2.0 flash drives look the same, but that doesn’t mean they perform the same. Differences in the type of memory and, to a lesser extent, the type of I/O controllers used by USB drives can make ...