There is no technical difference, the speed is the same. It is only the optics that differ.

Samsung Electronics GmbH
Hello,
Thank you for your enquiry.
The Samsung Portable SSD T5 is available in different colour variants, which do not differ in transfer speed. This is up to 540 MB/s. (Please note that the performance depends on the host configuration and the test software).
Best regards from Schwalbach,
Your Samsung Service Team