No idea about the brand, however some of them are actually on par with the branded ones that we get paying three times the price of these ones. Almost all braids are made in china only, its the QA that matters between the branded and unbranded ones. If you could get a sample, maybe you can test the breaking strength using weights/spring scale and compare it using the same tests with the branded braids. Do the test at least a few times with several samples. That should give you a rough real world idea. Also look for the consistency of the twists and if paranoid, the whole length !
Quite a lot of people around here I know use them regularly and they haven't had any major complaints with them. Angling is the kind of sport that once it turns addictive turns out to be very expensive.
Tight lines !