Miért hasonlit a RUF-auto a porsche-hez?

"RUFs are built from unmarked Porsche bodies and chassis. When a chassis arrives, RUF builds their own independent work into the car. Because RUF installs many of their own-made parts, the company is recognized as a manufacturer by the German government. RUF is mostly known for their CTR Yellowbird, and is the biggest and most renowned company to make Porsche performance enhancements. RUF has also made a name for itself as an automobile refiner, specialist in vintage restoration and rebuilds of classic RUF and Porsche automobiles." ezért

Mert Porsche bázisra épít, de önálló gyártóként van bejegyezve, nem tuningcég.