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Jake isn't a bearing engineer but Ed is and I'd bet that he has looked at a lot of the failed bearings that were OEM. I've seen his analysis and even his comments on the original bearings specs pointed to a potential problem so even if they were genuine ....
Bearings aren't just polished balls but a complex assembly of races. seals, packaging, initial lubrication, etc. designed and specified for the loads and environment that they will operate in. And, of the products that have been out there the longest, even LN had one of theirs that had to be redesigned specifically for them (which is why you can't buy one off the shelf and assume it is the same). This after it showed too much wear in the first few that were installed and then were pulled for analysis.
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