It's not a trick question and the answer is simple -- when both cars are sold at auction.

Hondas are many things -- well built, reliable, practical -- but collectible is usually not one of them. However, this weekend, a brand new Honda Acura NSX supercar, complete with VIN number 001 to indicate it is the very first off the production line, went under the hammer for a remarkable $1.2 million.

With a V6 engine, four wheel drive and three individual electric motors, the car promises an awesome blend of performance and high-tech innovation, but when it officially goes on sale to the general public later this year, prices are expected to cost 10% of what was paid at the charity auction in Scottsdale, Arizona.

"It was amazing to witness such generosity of spirit and passion for the new NSX," said Jon Ikeda, vice president and general manager of Acura.

The car, or rather the right to order and personalize the first production NSX when the lines start running, was bought by Rick Hendrick, who runs his own motorsports company. All money raised by the sale is going to the Pediatric Brain Tumor Foundation. "Mr. Hendrick will have the great satisfaction of owning and driving the very first next-generation NSX, and making a difference in the lives of thousands of children."

At the same time over in Florida at the Naples Winter Wine Festival charity auction, the chance to own the world's first production example of the new Rolls-Royce Dawn convertible was also up for grabs. To highlight its exclusivity, edition one boasts a number of unique touches, including engraved doorsills, a special red roof and full Santos Palisander Canadel Paneling throughout the interior.

Nevertheless, although the auction raised a total of $11.1 million for the Naples Children & Educational Foundation, and the Rolls-Royce was the star lot, it ‘only' managed to raise $750,000, a little over half what the mass-market Japanese supercar achieved.

"Over the past decade, Rolls-Royce Motor Cars has worked closely with many owners to raise millions of dollars for local charities. It is entirely befitting that the first new Dawn is born into such altruistic company," said Rolls-Royce CEO Torsten Müller-Ötvös.