Sherman, excellent list!
Soo easy to find the right sources... Well I am automotive journalist and this is our everyday job. When a new car debuts and we know almost all of its main components and what platform does it share, we basically know how it will feel. Of course, just the basics are the same and there will be inevitable differences but it usually fits in the large picture. The variables such as noise dampening, various settings are minor, but they greatly influence the overall feel of the car. The graining of the plastics or the upholstery is basically just data from the carmaker point of view. In your list, the Chrysler Stratus and the Mitsu Galant are different cars (they shared components in the past), while the Raider/Durango are twins.
A typical badge-engineered car shares around 60-65% of its parts with its twins (such as Peugeot 307/Citroën C4 etc.). Recently the most extreme parts sharing are produced by PSA/Toyota. They are producing together their A-segment vehicles (microcar) in the Czech city of Kolin, and these cars are 92% (!) identical. For three different brands! The car itself is based on a Toyota platform, with PSA diesels, Toyota gasoline engines, HVAC controls, inner door pulls, etc. The Toyota Aygo is the most individual of them, and that means that the Peugeot/Citroën twins are even more identical. Their shetmetal is the same, except the hood/front bumper. One has blacked out taillights, and the other is normal.
What the hidden information IS (translated for the detailing world), that we can obtain the necessary information when choosing a car. Some do it, some don't bother. But when you want to become an informed, educated customer, the detailing world will kill the source of info almost instantly and that is NOT RIGHT. And this world is inconsistent. We all know that the Meguiar's G-100 is the PC 7424/7336. Who cares? Will anybody shot me down when I start to discuss this "dangerous hidden agendas"? Nope. G-100? PC? One is cheaper, the other is comes with a better warranty. It is just a product - like certain liquids or pastes... But I want to know who the bulk manufacturer is who are its boutique brands.
If I know that BrandX is the major manufacturer of BrandY product, well this is GOOD! Because BrandX gallon sizes are out of reach for me (overseas shipping) I will buy the BrandY for money reasons - knowing that I get the same product and quality.
When I know that Toyota engines/components are good, reliable and I don't like the body of the Yaris, I could buy a Daihatsu Sirion with the same contents, components and a different body. Or, if I don't care about the look, I can/will buy the product that exactly fits my expectations - regardless of body/bottle/jar.
Final word is: I WANT USEFUL, RELIABLE INFORMATION! I WANNA BE A SOPHISTICATED, EDUCATED CUSTOMER!