Doesn't sound negligible to me:

In longer tests, both drives decrease sharply in performance as cache fills, which is expected. But while the older drive retains nearly two-thirds of its original performance, the newer version craters to less than a third. We can see this effect not only in artificial benchmarks, but also in large file copies [1]

While changing SKU is one step better than other manufacturers, it's still a shaddy behavior keeping the old name.

[1] https://arstechnica.com/gadgets/2021/08/samsung-seemingly-ca...