A lot of the Chinese fakes are shit.
A lot of them aren't. Many companies share factories for production - the labels go on some products and on others, the same product gets a different cosmetic, different name but is essentially the same.
I think quality control is probably a lot better with the name companies, but sometimes you'll get exactly the same thing. My cousin had the Fila contract for Singapore for quite awhile - and the clothes that came from the factory in China were nothing but standard things you'd pay low prices for, until she started sewing Fila patches onto them. At the time (late 90's, early 00's) she told me the tennis company Babolat (Nadal's sponsor) were having major issues because their factory in China was producing knockoffs using the same materials and molds and selling them for nothing. Basically the same racquets.
It's in the Chinese character to cheat. They don't see it as cheating. If you're smart enough to copy someone's good idea, you're a good businessman!