I have a Oceanis 45, built in the States. I really like the 469 (built in France?) but availability and negotiating power was much less. I am more critical of the build locations and those folks managing the builds. I'm not entirely impressed with the folks in Marion. Experience is key. Even in production boats there are differences between hulls 1, 50, and 100. How fast those differences occur is important, and how much actually needs to be changed.
As for the Toyota versus Lexus? I was an Engineer with Toyota. They are built in the same plants, sometimes on the same platform. The differences are in the finish. Better paint job, nicer leather, more features, real wood, more soft plastic surfaces, blah blah blah. The key was standardized work and consistency of build, for both, resulting in fewer defects. There is Quality and there is Quality. You can take a piece of exotic wood( higher quality??) or plastic, and screw them both up manufacturing (poor quality). I'd love to have the ear of a Beneteau exec.