Seems to me that 90% of what's on Amazon is Chinese - that's a ton of cheap crap taking over the US, but most people put price ahead of everything else.
Years ago I had some grief with Russel fittings and swore off that brand - never had a problem with Earl's though.
I have a LOT of Earl's fittings & some hose, enough for another lifetime, and don't like mixing brands in case there's a compatibility issue.