Depends on your own taste for risk, should the knock off brand have worse QC: what big brand gets you is the ability to sue them should their products fail catastrophically or cause you harm:

https://www.geekwire.com/2019/lawsuit-ruling-dog-leash-purch...

https://www.bbc.com/news/articles/c1k2ydn1rz8o

It seems like the retailers can be held responsible should "ASDAS_A!kr" drop off the radar, but might still be easier to sue local.

(I know "local" companies still find ways to settle / weasel their way out of responsiblities, but at least you know where to reach them...)