Oldsmobile Alero/Pontiac Grand AM - same exact car aside from lights and cladding

Buick Century/Buick Regal - two different names for the same car sold in the same dealership

Minivans - minor trim variations, sold in Oldsmobile, Chevy, Pontiac forms

Chevrolet Camaro/Pontiac Firebird - minor trim variations...lights and cladding

Honda practices "platform engineering" but you don't see them actually take the same actual car with different trim in both Acura and Honda dealers.