As much as I'm probably gonna get flamed for this.. napa & carquest, while known for high quality, are nothing more than reboxers.
They make no parts, they source them out from wherever and stick their name on it. There's nothing special about a napa part, nor carquest.
I was told by a rep that napa branded plugs are made by champion and are the "b" plugs. they're ok, nothing beyond ok.
AC Delco, makes nothing for themselves, maybe packaging and reading materials.
But the name supercedes any potential quality issues.
Motorcraft o2 sensors are made by Bosch (at least all the ones I've seen). Bosch's o2 sensors are ok, they have longevity issues and lack of p/n for newer cars. But, as much as issues as people have with bosch, they'll buy the motorcraft over a Denso or NTK because it's a motorcraft. bosch doesn't make it any more special for Motorcraft.
the cheap chinese bearings, we have DTA the CRH, they work, and as for the price, I've only seen 2 hub assemblies come back in 3 years. I've seen more Timken's come back than anything else.
And Timken doesn't warranty anything. the jobber store eats the timken part. It goes into our metal recycling bin, we get a few bucks (literally) out of it and that comps for the loss of the timken warranty.
Every part is a gamble, it's just a luck of the draw that you got a good one.. I try to stay away from some of the import parts, but in the end, there's not always a viable choice.