This car makes me laugh, it's a replica of a few cars even down to the interior. It's lighter than the Veyron, it's not an easy 250mph either whereas the Veyron, calm as you like will do 0-250-0 about 4 times in a trot before you need to let it cool down before going again.
Even though this car is faster, the Veyron still spanks it due to the ease in which it can do what it does. Also Bugatti believe the Veyron can do 260mph+ but they aren't confident in the tyres and in fact the original limit for the Veyron was going to be 257mph, 6-7mph slower than what it's maximum was thought to be.
The Veyron could embarass a lot of cars but Bugatti isn't small like that, they know they have the best and don't need to do anything to prove it.
Also look at the weight and power differences and honestly think to yourself, how could they only manage another 3-6mph faster than what is effectively a luxury boat for the road.