USB 3.2 Gen 2x2 external SSDs like the Samsung T9 have their peak performances capped by the inherent limitations of the USB protocol they're transferring over. This can make it hard to stand out against the crowd, but Samsung doesn't seem to struggle. It didn't struggle with the awesomely rugged T7 Shield, and it doesn't struggle with its latest addition, the T9.
The reason? It's packed to the brim with quality components. We don't have to go poking around inside to know this, either; the quality shines through in performance.