I don't know hardly anything technically speaking about bicycle components. When something needs replacing, my lbs understands to install the manufacturer's mid price part, figuring that way I get the most for my bucks. Has worked very well for 5 years and thousands of miles.

It seems that the lighter a part is the more it cost and the more fragile. A buddy ordered some high price hubs for a new LHT. Rear one failed after 300 miles and left him stranded in Big Sur. Go figure.