I have to agree with Tristan about NA vs FI.
Take for instance the Pagani Zonda. Performance-wise, the most spectacular thing about it is the instant throttle response because it is naturally aspirated. Now, the only reason it has not been brought to North America yet is because to get it emissions legal it would have to be detuned and modified. Of course, this will make it loose power, and then those of us in North America will have a car that is not as good as the European version. Currently, the only way to solve this would be to add some form of FI setup. BUT, giving it some sort of FI will compromise the instant throttle response, and thus, the Pagani Zonda loses one of the things that make it so special. Horacio refuses to give the Zonda an FI setup for precisely this reason.
Point being - in an NA engine, you get instant response, whereas in FI setups you get lag. AFAIK, the Zonda is the only modern supercar that is naturally aspirated aswell.