Gran Turismo 5 V.S. Forza 3

[PooperScooper]

"With regards to car damage, Yamauchi noted that the original promise of realistic and full car damage has been slightly compromised. Some cars will suffer from damage, and some won't, as allowed by the respective manufacturers. He also noted that should you suffer from the "ultrarealistic simulation" of a high-speed crash, you would "lose your car," perhaps hinting that totaling a car would remove it from your garage."

http://arstechnica.com/journals/thumbs.ars/2007/12/18/kazunori-yamauchi-dishes-more-gran-turismo-5-details