I'm not a bearing expert, but I have been watching a few videos of a bloke who fixes electric hand tools. That often requires replacing bearings. He often comments that while bearings are often made in China, to quality depends on whioch company they are made for. In other words, they are manufactured to specification. If the spec is good, then the company name is imprinted on them as well as the Made in China mark. If they are El Cheapo, they are marked simply with China.
One thing that I have learned from those videos is that the cheaper tools from names like DeWalt and Milwauke use the cheap bearings. That means that it is often not worth the labour to replace them so the tools are throw away.